Assertion: Intra cytoplasmic sperm injection (ICSI) is a procedure to form an embryo in vitro.
Reason: In ICSI, sperm is directly injected into the ovum.
A) Both Assertion and Reason are correct and the Reason is the correct explanation for Assertion.
B) Both Assertion and Reason are correct but the Reason is not the correct explanation for Assertion.
C) Assertion is correct but Reason is incorrect.
D) Both Assertion and Reason are incorrect.

Hint: In order to overcome the consequences of infertility in some cases, certain techniques have been innovated and designed in such a manner that helps in formation of embryos in the laboratory and also their implantation in the recipient's body.

Complete answer:
There are cases of infertility when the sperm cannot penetrate the outer layer of the ova for a variety of reasons. This penetration is required so that the sperm can push its whole body in the ova and fertilization can occur. To overcome this, a technique called intracytoplasmic sperm injection (ICSI) is carried out along with in vitro fertilization (IVF) which helps fertilize the egg.

Option B: In ICSI, a single sperm is injected directly into the cytoplasm of the egg. This is done through a tiny needle called a micropipette. The procedure is carried out in vitro in order to develop an embryo by aiding in fertilization. Both the assertion and reason are correct but reason is not the correct explanation of assertion. Therefore, this is the correct option.

Option A, C and D: In ICSI, a single sperm is injected directly into the cytoplasm of the egg. This is done through a tiny needle called a micropipette. The procedure is carried out in vitro in order to develop an embryo by aiding in fertilization. Both the assertion and reason are correct but reason is not the correct explanation of assertion. Therefore, this is the incorrect option.

Thus, the correct answer is option (B) Both Assertion and Reason are correct but the Reason is not the correct explanation for Assertion.

Note: ICSI has the chance to fertilize 50-80% of eggs. However, after the fertilization occurs the probability of having twins, single baby or triplets is independent of ICSI or any other IVF technique.