Answers -
A. Rickets is caused by deficiency of Vitamin D. [0.5 mark]
B. Deficiency of vitamin B causes a disease known as beriberi. [0.5 mark]
C. Deficiency of Vitamin C causes a disease known as scurvy. [0.5 mark]
D. Night blindness is caused due to deficiency of vitamin A in our food. [0.5 mark]