Cu T 200 is so called -
Ans. is 'a' i.e., 200 sq. mm of Cu+ over loop o The numbers included in the names of the intrauterine devices refer to the surface area (in sq. mm) of cooper on the device.
200 sqmm of Cu2+ over loop
200 mm of Cu over loop
For 200 days, Cu concentration does not changes
200 sqcm of Cu over loop