Explanation

Ishrat Usmani was a Pakistani nuclear physicist 

He chaired the Pakistan Atomic Energy Commission from 1960 to 1971.

Explanation

March 1956

In 1956, the Government of Pakistan established the Atomic Energy Commission (PAEC) to direct a new program. The United States handed Pakistan the first 5 MW Pakistan reactor (PARR-1) in 1962.

Explanation

HIV is a retrovirus, meaning that it carries single-stranded RNA as a genetic material rather than the double-stranded DNA carried by human cells.

Aids way to spread is Touch

AIDS stands for Acquired Immunodeficiency Syndrome.

HIV stands for Human Immunodeficiency Virus.

HIV attacks the immune system of the body 

AIDS virus has single-stranded RNA

AIDS is not a genetic disorder

Explanation

On Dec 24 1979 the USSR invaded Afghanistan, under the pretext of upholding the Soviet-Afghan friendship treaty of 1978.

After the Russians left Afghanistan Burhanuddin Rabbani's government was recognized by UNO

The USSR entered neighboring Afghanistan in 1979

ND11-2-2023

Explanation

 Reduce the deficit on the balance of trade

The government may raise tariffs on imported goods or introduce quotas. Both  measures will lead to a reduction in imports and thus an improvement in the current account balance.

Explanation

Destroyed

Antonym of Extant is Destroyed

Explanation

1986

Pakistan continues to promote its uranium enrichment program, which, according to Pakistani sources, gained the ability to carry out a nuclear explosion in 1987.

Explanation

When nuclear energy is intended to be harnessed for the generation of electricity, potentially

destructive neutrons released in a nuclear reactor are absorbed by  Cubical blocks of steel Long rods of CD and  A pile of blocks made of graphite

Explanation

Attack

Antonyme of besiege is attack

besiege محاصرہ

Explanation

World Wide Web (WWW)

World-Wide Web Worm (WWWW)

English scientist Tim Berners-Lee invented the World Wide Web in 1989.

WWW Birth place CERN near Geneva, Switzerland.

The browser was released for general public in August 1991.