<prompt> Which hormone is responsible for acne -EstrogenThyroidTestosteroneGonadotropins  <response>: Ans. is c i.e., TestosteronePredisposing factors for Acne vulgariso Genetic factorso Hormones - Androgens, glucocorticoids,o Psychological stress and depression,o Environmental factors - High temperature humidity,o Cosmetics - Containing lenolin, petroleum, vegetable oils,o Infection - Propionibacterium, Pityrosporum, Staph, epidermidis.o Menstural cycle - Premenstural aggravation,o Hyperkeratosis of pilosebaceous ostia.o Drugs - Antepileptics Carbamazepine, phenytoin, phenobarbitone, antitubercular INH, rifampin, ethionamide, antidepressants, cyclosporine,Vitamin B12, Cough syrups containing halogens Iodides, bromides. 