Explanation

• O⁻ (O Negative) is the universal donor blood group.
• It can be transfused to A, B, AB, and O blood groups.
• O⁻ blood lacks A, B, and Rh (D) antigens.

Additional information:

• Universal Recipient: AB⁺ (AB Positive)
• ABO Blood Groups: A, B, AB, O
• Rh Types: Positive (+) and Negative (−)
• Total Common Blood Groups: 8 (A⁺, A⁻, B⁺, B⁻, AB⁺, AB⁻, O⁺, O⁻)

Last verified on 14-07-2026

Explanation

• The largest river in Pakistan is the Indus River.
• It is the National River of Pakistan.

Additional information:

• The Indus River starts in Tibet.
• It originates from the Mansarovar lake.
• They flow through India, Pakistan.
• It finally falls into the Arabian Sea near Karachi.
• They start making a delta near the city of Thatta.
• The old name of the Indus River was Sindhu.
• There are 6 Barrages constructed in the Indus River.
• The length of the Indus River is 3,180 km.
• The 2nd source of Indus River is Gar Tsangpo.
• The upper Indus Plain starts from Kalabagh.
• The upper Indus Plain ends at Mithankot.

Last verified on 10-07-2026

Explanation

• A Gordian knot means a very difficult, complicated, or seemingly impossible problem.
• کسی بہت پیچیدہ یا مشکل مسئلے کو فوری اور دلیری سے حل کرنا

Explanation

Zeal means جوش

Apathy means بے حسی

Explanation

• Urdu is the national language of Pakistan.
• Article 251: The 1973 Constitution of Pakistan formally declares Urdu as the national language

Additional information

• National Animal: Markhor
• National Tree: Deodar
• National Dish: Nihari
• National Fruit: Mango
• National Flower: Jasmine
• National Vegetable: Lady Finger (Okra)
• Field hockey is Pakistan's official national sport.

Last updated by NA on 09-09-2026

Explanation

• Prophet Dawood (AS) is known for being a good player of flute.
• Holy Book: Zabur
• Special blessing: Beautiful and melodious voice
• Associated with: Glorification of Allah by birds and mountains
• Known for: Beautiful recitation and voice

Last verified on 09-09-2026

Explanation

Pakistan is the world's fifth-most populous country. The population density in Pakistan is 287 per km² (742 people per mi²). Pakistan world's second-largest Muslim population. The top 10 most populous countries in the world: China India The United States Indonesia Pakistan Brazil Nigeria Bangladesh Russia  Mexico Last verified on 04-09-2026

Explanation

• Pakistan’s largest oil fields are located in District Attock.
• Khaur Oil Field is located in Attock District.
• Khaur was discovered in 1915 by the Attock Oil Company.
• It is considered the oldest oil field in Pakistan.
• Joya Mair Oil Field was discovered in 1944.
• Balkassar Oil Field is located in Jhelum District.

Last verified on 04-09-2026

Explanation

• The ovum (egg cell) is generally considered the largest cell in the human body.
• It is the female reproductive cell and can be seen with the naked eye as a tiny dot.
• The ovum is approximately 0.1 mm (100 micrometers) in diameter.
• In contrast, the sperm cell is one of the smallest human cells.

Last verified on 03-09-2026

Explanation

• The largest bone in the human body is the femur (the thighbone)
• It is located in the upper leg, between the hip and the knee.
• It supports the weight of the body and helps you walk, run, and stand
• It is about 48 centimeters (18 inches) long.

Additional information:

• The lowest part of the backbone is called the sacrum.
• The smallest bone is the stirrup (stapes).
• The strongest bone for its size is the lower jaw or mandible.

Last updated by NA on 09-09-2026