Menadione is an analogue of: (A) Vitamin C, (B) Vitamin A, (C) Vitamin D, (D) Vitamin K
Answer is D. ref: Ganong&;s review of medical physiology; 24th edition; page no;492 menadione C11H8O2(2-methyl-1,4-naphthoquinone) A compound used as a vitamin K supplement; impoant in blood clotting.