Gynaecology & Obstetrics General 7d3d2faf True about chancroid is A Incubation period is 3 to 10 weeks. B Characterised typically by prodromal symptoms and systemic reaction. C Painful ulcer with irregular erythematous non-indurated margins. D Ulcer base is hard, indurated. High-Yield Explanation Chancroid: Incubation period = 3 to 10 days It lacks systemic reaction and prodrome. Ulcer base is soft.