The deficiency of one of the following in the diet of a person for a considerable time can lead to a disease called night blindness. This one is:
(a) vitamin B
(b) vitamin D
(c) vitamin A
(d) vitamin C
Fill in the blanks:
(a) _________ is caused by the deficiency of vitamin D.
(b) Deficiency of _________ causes a disease known as beri-beri.
(c) Deficiency of vitamin C causes a disease known as _________.
(d) Night blindness is caused due to deficiency of _________ in our food.