This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
A 55-years-old lady presenting to out patient department (OPD) with postcoital bleeding for 3 months has a 1 x 1 cm nodule on the anterior lip of cervix. The most appropriate investigation to be done subsequently is: 
Select and explain. 
A. Pap smear, B. Punch biopsy, C. Endocervical curettage, D. Colposcopy
B: Punch biopsy
Answer: B: Punch biopsy 
Explanation: None