1646: With reference to the art and archaeological history of India, which one among the following was made earliest?

(a) Lingaraja Temple at Bhubneshwar
(b) Rock-cut Elephant at Dhauli
(c) Rock-cut Monuments at Mahabalipuram
(d) varaha Image at Udayagiri
1647: Assertion (A) :
Synthetic detergents can lather well in hard water.

Reason (R) :
Synthetic detergents form soluble calcium and magnesium salts with hard water.

(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 a correct explanation of A

(c) A is true but R is false

(d) A is false but R is true
1648: Dinosaur was

(a) A reptile

(b) An amphibian

(c) A mammal

(d) A bird
1649: The area of an ellipse is twice that of a circle. The major diameter of the ellipse is twice that of the minor diameter. The radius of the circle is

(a) 50% of minor diameter of the ellipse
(b) 50% of major diameter of the ellipse
(c) minor diameter of the ellipse
(d) major diameter of the ellipse
1650: Consider the following statements:

Coal sector was nationalized by the Government of India under Indira Gandhi.
Now, coal blocks are allocated on lottery basis.
Till recently, India imported coal to meet the shortages of domestic supply, but now India is self-sufficient in coal production.
Which of the statements given above is/are correct?

(a) 1 only

(b) 2 and 3 only

(c) 3 only

(d) 1, 2 and 3