Question

The process of fertilization of a human egg can be confirmed by the presence of __________.

• A. perivitelline space
• B. \(1^{st}\) polar body
• C. \(2^{nd}\) polar body
• D. germinal vesicle

Hint:

Think about which structure forms only after the sperm enters the secondary oocyte.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
The secondary oocyte released at ovulation is held at metaphase II.

Step 2: What happens at fertilisation
Meiosis II is completed only after the sperm enters. This forms the ovum and a second polar body.

Step 3: Compare the options
The first polar body and the perivitelline space are present even before fertilisation. The germinal vesicle is the nucleus of the primary oocyte. So only the second polar body confirms fertilisation.

Final Answer:
Presence of the second polar body confirms fertilisation. \[ \boxed{\text{(C) }2^{nd}\text{ polar body}} \]