Explanation

Pakistan's first indigenously developed main battle tank was the Al-Khalid

Which was jointly developed with China in the 1990s

And entered service in 2001.

An upgraded version, the Al-Khalid-I, was inducted in 2020

Explanation

The region between the Tropic of Cancer and the Tropic of Capricorn is the Torrid zone.

The hottest central belt of the Earth..

This area receives direct sunlight throughout the year, resulting in a warm climate and high temperatures. 

Explanation

Rehman Baba was a legendary Pashto Sufi poet.

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Explanation

The 2020 Nobel Prize in Economic Sciences was awarded to Paul R. Milgrom and Robert B. Wilson of the United States

For their work on auction theory and new auction formats

Both laureates are professors at Stanford University in the United States.

Explanation

Based on the search results, Velocity is not a unit.

It is a physical quantity, specifically a vector quantity, that measures the rate of displacement. 

Meter (m): This is the SI unit of length

Time: This is a fundamental physical quantity, and its SI unit is the second (s).

Kilogram (kg): This is the SI unit of mass. 

Explanation

Intel is best known for producing microprocessors.

The company is one of the world's largest semiconductor manufacturers

And supplies processors for a vast number of computer system manufacturers.

Intel's microprocessors are found in most personal computers and are branded under product lines such as: 

Intel Core for desktops and laptops.

Intel Xeon for servers and workstations.

Intel Atom for mobile devices. 

Explanation

The file extension .txt is used for plain text files.

These files contain simple text data, such as notes, instructions, or program source code

Explanation

The food item was fantastic on the menu card.

The preposition on is used when referring to a food item

On the menu: This means the item is listed on the physical or digital menu.

Explanation

Everything is good on the menu

We use "on the menu" when talking about items listed in a menu.  

So, the correct preposition is "on", not "in", "at", or others.

Explanation

When two subjects are joined by "as well as", the verb agrees with the first subject.  

Here, "Father" is singular, so the verb should be "was".