<prompt> Investigation of choice in postcoital bleeding in a 60-year-old lady is:Pap smearColposcopy and biopsyPelvic ultrasoundCone excision of cervix  <response>: An old lady presenting to OPD with post coital bleeding with a leison visible on cervix- raises the suspium carcinoma cervix in this case because CIN is asyntomatic . In such cases pap smear is of no use and directly biopsy should be done. Since lesion is visible we will go for punch biopsy.Investigation Protocol for Diagnosis of Carcinoma Cervix: 