1.What is the calling code of India ?

A.001
B.91
C.84
D.0

Correct answer is B 91
Calling code is also known IDD (International Direct Dialling) or ISD (International Subscriber Dialling) 

2.In which year , India conducted it's first nuclear test ?

A.1974
B.1975
C.1998
D.1999

Correct answer is A.1974
On 18 May 1974 at Pokhran, India conducted it's nuclear test. It was codenamed as Smiling Buddha. It was also the first confirmed nuclear test by a nation outside the five permanent members of the United Nations Security Council.

3.Who was the first Governor General of India ?

A.Lord Mountbatten
B.C. Rajagopalachari
C.Viscount Wavell
D.Lord Irwin
.
Correct answer is A. Lord Mountbatten
He was a British admiral and statesman of German descent. He was the last Viceroy of the British Indian Empire and the first Governor-General of the independent India