The correct option is C Kanpur
Lippes loop is a type of intrauterine contraceptive device made of inert plastic in a double S-shape, which can be inserted through the cervix into a cannula and takes a trapezoidal shape within the uterus. The Lippies Loop was made up of polyethylene and impregnated with radium phosphate for radiopacity. It was used worldwide but in many countries including India as well, it is being replaced with Copper T. It was manufactured in Kanpur. Hence, option D is the correct answer.