First, we need to know about the IUD. An intrauterine device (IUD) also called an intrauterine contraceptive device or small coil is mostly a T-shaped birth control gadget that is injected into the uterus to control pregnancy. IUDs are LARC (long-acting reversible birth control). Research gives the information that female family planning givers select the LARC process usually (41.6%) more than the normal public (12.1%). Among all the birth control processes, IUDs, besides contraceptive implants, are the most acceptable by users.
Now, the answer is:
Lippes loop is IUD impregnated which includes barium sulfate.
Copper-eliminating IUDs, like CuT, Cu7, Multiload 375, etc, secrete copper that inhibits sperm movement which ultimately decreases its fertilizing capability.
LNG-20 is IUD that excretes levonorgestrel (LNG), causes endometrial atrophy, and alters the stroma to inhibit implantation. It also boosts sperm phagocytosis in the uterus.
Thus, the correct option is A: LNG-20.
The hormone-releasing IUDs are LNG-20. It acts as a contraceptive by making the cervix hostile to sperm and the uterus unsuitable for implantation.
IUD - Intra Uterine Devices
Contraceptive - Ptrvrnts pregnancy.
Hormone: Progestesert and LNG-20
Make the uterus unsuitable for implantation.
Make the cervix hostile to the sperm.
The correct option will be (A) LNG -20.
Student to attempt either option-(A) or (B):
(A) Study the given diagram showing the sectional view of a seminiferous tubule.
Answer the following questions:
OR
(B) Study the figures given below showing initial stages in the formation of female gametophyte and answer the questions that follow.
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is : 
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is:
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