1976: The discovery of Oak flora in 1966 added a new chapter to the history of Indian Sericulture. Which one of the following states is the leading producer of Oak tasar silk ?

(a) Assam
(b) Bihar
(c) Manipur
(d) Orissa
1977: 'Doctors Without Borders (Medecins Sans Frontieres)', often in the news, is

(a) a division of World Health Organization
(b) a non-governmental international organization
(c) an inter-governmental agency sponsored by European Union
(d) a specialized agency of the United Nations
1978: Consider the following statements:

1. The Nuclear Suppliers Group has 24 countries as its members.

2. India is a member of the Nuclear Suppliers Group.

Which of the statements given above is/are correct ?

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
1979: Assertion (A)
In our houses, the current in AC electricity line changes direction 60 times per second.

Reason (R):
The frequency of alternating voltage supplied is 60 hertz.

(a) Both A and R are individually true and R is the correct explanation of A

(b) Both A and R are individually true but R is not the correct explanation of A

(c) A is true but R is false

(d) A is false but R is true
1980: A car runs at a speed of 40 km per hour during the first half of the journey and at a speed of 60 km per hour during the second half of the journey. The average speed of the car is:

(a) 48 kmph

(b) 50 kmph

(c) 52 kmph

(d) 54 kmph