Which of the following statement is INCORRECT?

PYQ SSC JE (Junior Engineer) 2018

1. A.

   Oviparous animal does not give birth to young ones.

2. B.

   Each sperm is a single cell.

3. C.

   External fertilisation takes place in frog.

4. D.

   Fertilisation is necessary even in asexual reproduction.

Attempted by 7 students.