631: Ergotism is due to consumption of
(a) contaminated grains
(b) rotting vegetables
(c) contaminated water
(d) stale cooked food
632: Who was the founder of the Servants of India Society?
(a) G. K. Gokhale
(b) K. M. Roy
(c) M. K. Gandhi
(d) B. G. Tilak
633: Which of the following is/are used as biofertilizers ?
I. Azolla
II. Blue-green algae
III. Alfalfa.
Select the correct answer using the codes given below.
Codes:
(a) II alone
(b) I and II
(c) I and III
(d) I, II and III
634: Cover of a solar cooker is made of glass. Why ?
(a) It absorbs sun rays
(b) It reflects sun rays
(c) Sun heat is transmitted through glass without much absorption
(d) None of these
635: The deficiency of Vitamin D causes:
(a) Rickets
(b) Night blindness
(c) Pellagra
(d) Scurvy