This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Skin
Painful ulcer on glans penis is seen in: 
Select and explain. 
A. Syphilis, B. Lymphogranuloma venerum, C. Chancroid, D. Chancre
C: Chancroid
Answer: C: Chancroid 
Explanation: Ans: (c) ChancroidRef: Harrison 19th ed. / 881, 1134* Chancroid is a bacterial STD caused by H.Ducreyi. It is characterized by painful sores on the genitalia. Chancroid is known to spread from one individual to another solely throueh sexual contact.* A chancre on the other hand is a painless ulceration/ sore most commonly formed during the primary stage of syphilis.