This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drugs, Subject name: Skin
Whitfield's ointment consists of - 
Select and explain. 
A. 3% salicylic acid + 6% benzoic acid, B. 3% benzoic acid + 6% salicylic acid, C. 2% salicylic acid + 4% benzoic acid, D. 2% benzoic acid + 4% salicylic acid
A: 3% salicylic acid + 6% benzoic acid
Answer: A: 3% salicylic acid + 6% benzoic acid 
Explanation: Ans. is 'a' i.e., 3% salicylic acid + 6% benzoic acid Whitfield's Ointmento Whitfield's ointment is salicylic acid and benzoic acid in a suitable base, such as lanolin or vaseline,o The original ointment contains 3% salicylic acid and 6% benzoic acid, but other ratios are also used,o It is used for the treatment of fungal infections, such as athlete's foot. Its effectiveness is unclear,o It can have a slight burning effect that goes away after a few minutes,o It is named for Arthur Whitfield (1868-1947), a British dermatologist.