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
Drug causing icthyosis and hyperpigmentation, when used in leprosy is - 
Select and explain. 
A. Rifampicin, B. Dapsone, C. Clofazimine, D. Ethionamide
C: Clofazimine
Answer: C: Clofazimine 
Explanation: Ans. is 'c' i.e., Clofazimine o Adverse effects of clofazimine 1. Skin ---> Reddish-black discolouration of skin, dryness of skin and itching, Discolouration of hair and body secretions, acneform eruptions and phototoxicity, conjuctival pigmentation. 2. GIT --> Enteritis with loose stools, nausea, abdominal pain, anorexia and weight loss.