Assertion: The zygote developed from sexual reproduction is diploid and forms embryo.

Reason: In sexual reproduction, haploid gametes fuse and form zygote.

Both A  and R are true, and R is the correct explanation of the A .

The correct answer is Option (4)- Both A and R are true, and R is the correct explanation of the A .

Assertion (A): The zygote developed from sexual reproduction is diploid and forms the embryo. This statement is true. In sexual reproduction, when a sperm (haploid) fertilizes an egg (haploid), they combine to form a diploid zygote, which then develops into an embryo.

Reason (R): In sexual reproduction, haploid gametes fuse and form a zygote. This statement is also true and directly supports the assertion. It explains the process by which a diploid zygote is formed from haploid gametes. Therefore, Reason (R) is the correct explanation for Assertion (A).