Correct Answer: i-b, ii-a, iii-d, iv-c

Solution : The correct option is i-b, ii-a, iii-d, iv-c.

Beriberi is caused by a deficiency of vitamin B, specifically Thiamine. It is a condition characterized by neurological and cardiovascular symptoms. Night Blindness is associated with a deficiency of vitamin A (Retinol), a crucial nutrient for maintaining vision health. Osteoporosis, a condition marked by the weakening of the bones, is linked to a deficiency in vitamin D. Scurvy results from a deficiency in vitamin C (Ascorbic acid), leading to symptoms such as weakness, fatigue and swollen gums.