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: Dental
One of the following is a side effect of clofazimine used in leprosy therapy – a) Hyperpigmentationb) Erythemac) Discoloration of body secretionsd) Macular rash 
Select and explain. 
A. a, B. ac, C. ad, D. b
B: ac
Answer: B: ac 
Explanation: 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.