You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is 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: and explain in detail?
None