Fill in the blanks:

a. ______ is caused by 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.


(a) Rickets, (b) vitamin B1 (c) scurvy, (d) vitamin A.


5
1