Explanation

Solution :

If x= 2, y = 3, z = 4 then

$3x^2-4y^2+2z^2$

=$3(2)^2-4(3)^2+2(4)^2$

=$\left(3\times4\right)-\left(4\times9\right)+\left(2\times16\right)$

=$12-36+32$

=$44-36$

=$8$

∴ $3x^2-4y^2+2z^2=8$

Explanation

Immunization is the method by which the care of disease is done Use of vaccine.

..

immunization: A process by which a person becomes protected against a disease through vaccination.

Vaccination: The act of introducing a vaccine into the body to produce protection from a specific disease

ND16-8-2023

Explanation

 Benjamin Disraeli prime minister of England served on two occasions.

Benjamin Disraeli, 1st Earl of Beaconsfield, was the Conservative prime minister of the United Kingdom of Great Britain and Ireland on two occasions.

Benjamin Disraeli become the first prime minister in 1868 and then between 1874 and 1880

***

ND16-8-2023

Explanation

Uncle Sam is the nick of the U.S.A

...

On September 7, 1813, the United States gets its nickname, Uncle Sam. 

The name is linked to Samuel Wilson, a meat packer from Troy, New York, who supplied barrels of beef to the United States Army during the War of 1812.

...

The land of Maple Leaves is a nickname for Canada

Land of the Rising Sun is a nickname for Japan

Land of White Elephants is the nickname of Thailand

Land of Milk and Honey is the nick of Israel 

the land of Rainbow is the nickname of South Africa

ND16-8-2023

Explanation

The lunar eclipse takes place when The shadow of the earth falls on the moon

..

The longest total lunar eclipse of the 21st century occurred from 27 July to 28 July 2018.

A lunar year of 12 cycles of lunar phases is about 354 days long.

The Lunar eclipse occurs when the moon comes between the earth 

Explanation

Her brother along with her parents " insist" that she remain in school

• eliminates an error in the sentence

Her brother along with her parents "insists" that she remain in school

اس کا بھائی اپنے والدین کے ساتھ "اصرار کرتا ہے" کہ وہ اسکول میں ہی رہے۔

...

"Her brother" is singular and requires a singular verb.

"Along with" does not constitute a plural subject - if this had been "and" then insist would have been correct.

ND16-8-2023

Explanation

Rizwan Ali "had been" in Islamabad since the first of this month and does not intend to leave for London until his sister arrives.

• eliminates an error in the sentence

Rizwan Ali "has been" in Islamabad since the first of this month and does not intend to leave for London until his sister arrives.

ضوان علی اس ماہ کی پہلی تاریخ سے اسلام آباد میں ہیں اور اپنی بہن کے آنے تک لندن روانہ ہونے کا ارادہ نہیں رکھتے۔

****

“has been” is used to mean that something began in the past and has lasted into the present time.

such as "Rizwan was already in Islamabad and they stay her "  so " has been" is best to make a meaningful sentence

 ND16-8-2023

Explanation

 Before the search party reached the scene of the accident, "the rain began to fall ", making the rescue effort more difficult.

• eliminates an error in the sentence

 Before the search party reached the scene of the accident "The rain had begun to fall" making the rescue effort more difficult.

اس سے پہلے کہ سرچ پارٹی جائے حادثہ پر پہنچ جائے "بارش شروع ہو چکی تھی" جس سے بچاؤ کی کوششیں مزید مشکل ہو گئیں۔

***

"had begun" in the past perfect tense.

 the past perfect indicates that the thing happened and was completed.

such as "the rain is starting and fall" so we use "had begun" here to make a meaningful sentence

ND16-8-2023

Explanation

"Play being recognized" as an important factor in improving mental and physical health and thereby reducing human misery and poverty.

• eliminates an error in the sentence

"Play is recognized as" an important factor in improving mental and physical health and thereby reducing human misery and poverty.

"کھیل کو" ذہنی اور جسمانی صحت کو بہتر بنانے اور اس طرح انسانی مصائب اور غربت کو کم کرنے میں ایک اہم عنصر کے طور پر تسلیم کیا جاتا ہے۔
...

• Error in following conventions.
• This is an incomplete sentence or fragment.
• The sentence needs a verb to establish a principal clause.
• Choice D provides the verb (is recognized) and presents the only complete sentence in the group.
  

Explanation