556: The principal language of Nagaland is:
(a) English
(b) Naga
(c) Assamese
(d) Khasi
557: Examine the following statements regarding a set of balls :
I. All balls are black.
II. All balls are white.
III. Only some balls are black.
IV. No balls are black.
Assuming that the balls can only be black or white, which two statements given above can both be true, but cannot both be false ? Choose the correct answer from the codes given below :
Codes :
(a) I and IV
(b) I and III
(c) II and III
(d) III and IV
558: Which of the following diseases of milching animals are infectious?
1. Foot and Moth disease
2. Anthrax
3. Black Quarter
4. Cowpox
Select the correct answer using the code given below:
(a) 1, 2 and 3
(b) 1 and 4
(c) 2, 3 and 4
(d) 1, 2, 3 and 4
559: Which one of the following statements regarding starch and cellulose is not correct ?
(a) Both of them are of plant origin
(b) Both of them are polymers
(c) Both of them give colour with iodine
(d) Both of them are made up of glucose molecules
560: According to Meadows (1972), if the present trends in world population, industrialisation, pollution, food production and resource depletion continue unchanged, the Limits to Growth on our planet will be reached in the next
(a) 50 years
(b) 100 years
(c) 150 years
(d) 200 years