Select in the INCORRECT statement about external fertilization.

• A

  Organisms showing external fertilization produce a large number of male gametes only.

• B

  External fertilization is very uncertain requires synchrony between release of male and female gametes.

• C

  It is replaced by internal fertilization in higher organisms as it wastes energy and requires external medium like water.

• D

  It occurs in most of the fish and amphibians.