Pick up the correct match of deficiency diseases related to respective vitamin.

Disease	Vitamin
A. Pellagra	p. Vitamin $B_1$
B. Scurvy	q. Niacin
C. Nyctalopia	r. Vitamin C
D. Beri-Beri	s. Vitamin D
	t. Vitamin A

The correct option is A A- q, B- r, C- t, D- p
Pellagra is a vitamin deficiency disease caused by a chronic deficiency of niacin (vitamin $B_3$). Scurvy is a disease caused by a diet, that lacks vitamin C (ascorbic acid). Nyctalopia also called night blindness, is a condition making it difficult or impossible to see in the relatively low light. One cause of night blindness is a deficiency of retinol, or vitamin A. Beriberi is a disease brought on by vitamin $B_1$ (thiamine) deficiency.