Ans: a
Expl: During his term as the Chief Justice of India, the then-President of India, Zakir Husain died suddenly, in harness, on 3 May 1969. Then-Vice President of India Mr. V. V. Giri became the acting President. Later, Giri resigned from both offices as acting President and Vice-President to become a candidate in the 1969 Presidential Election. Hidayatullah then served as the President of India for a short period from 20 July to 24 August. The visit of President of the United States Richard Nixon to India made his Presidential term historic.
After his retirement, Hidayatullah was elected as the Vice-President of India by a consensus among different parties and occupied that high office with distinction from 1979 to August 1984. During his tenure as the Vice-President, he won the respect of all concerned for his impartiality and independence.
In 1982, when the then President Zail Singh went to the U.S. for medical treatment, Vice-President Hidayatullah officiated as President from 6 October 1982 to 31 October 1982. Thus, he officiated as acting President twice.

Ans: a
Expl: The main block of the building has been designed in an Indo-British style by the chief architect Ganesh Bhikaji Deolalikar, the first Indian to head the Central Public Works Department.

Ans: b
Expl: Bird flu, also called avian influenza, is a viral infection that can infect not only birds but also humans and other animals.
H5N1 is the most common form of bird flu. It’s deadly to birds and can easily affect humans and other animals that come in contact with a carrier.
The virus isn’t known to spread via human-to-human contact.

Ans: c
Expl: GDP stands for the total value of goods and services produced inside the territory of India irrespective of whom produced it – whether by Indians or foreigners.

Ans: c
Expl: Bankruptcy & Insolvency, Forest and Education are the subjects of Concurrent List.