This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
[{'content': 'The lesion is painful and bleeds easily while taking the swab for gram staining. What will be the probable cause of infection? \nSelect and explain. \nA. Haemophilus ducreyi, B. Triponema pallidum, C. HPV, D. HSV 2', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Haemophilus ducreyiImage description - Chancroid (also known as soft chancre and ulcus molle) is a bacterial sexually transmitted infection characterized by painful ulceration on the genitalia that bleeds easily on if it is scrapped.", 'role': 'assistant'}]