This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Phenytoin toxicity- 
Select and explain. 
A. Gum hyperophy, B. Acne rosacea, C. Exacerbation of acne vulgaris, D. Loss of hair
A: Gum hyperophy
Answer: A: Gum hyperophy 
Explanation: Ans. is 'a' i.e., Gum hyperophy