This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexually transmitted diseases, Subject name: Dental
[{'content': 'A man having multiple, painful, indurated,undermined,sloughed,edged glans which occurred 5 days exposures;most likely dignosis is- \nSelect and explain. \nA. Chancroid, B. Primary chancre, C. Herpes genitalis, D. LGV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Chancroid is caused by Hemophilus ducreyi and it&;s incubation period is 3-5 days. It causes multiple, superficial, tender, soft , ragged ulcers which bleeds on manipulation. These ulcers ate located in the genitals. In syphilis the incubation period is 9-90 days. From illustrated synopsis of dermatology and sexually transmitted diseases neena khanna 5th edition page no 327', 'role': 'assistant'}]