Multiple choice general knowledge Beri-Beri is the deficiency disease caused by the vitamin C A B5 B1 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Beri-Beri is a deficiency disease caused by lack of Vitamin B1 (thiamine). Vitamin C deficiency causes scurvy, Vitamin A deficiency causes night blindness and xerophthalmia, and Vitamin B5 deficiency causes fatigue and numbness.