<prompt> Which of the following is an example for Transplacental carcinogenesis?Vaginal CaPancreatic CaColon CaBreast cancer  <response>: Ref: Shaws Textbook of Gynaecology, 15th ed. pg :52 Explanation:Transplacental carcinogenesis is a series of genotypic or phenotypic changes in the cells of a fetus due to in utero exposure to carcinogens.Adenocarcinoma clear cell carcinoma was seen in the vagina in children whose mothers took Diethylstilbesterol for threatened abortion. 