Read the following and select the incorrect statements:

A. The placenta acts as a permanent endocrine tissue and produces several hormones.

B. During pregnancy levels of cortisol, prolactin, thyroxine, and estrogen hormones also increase several folds in maternal blood.

C. The second meiotic division of secondary spermatocyte in females is unequal and results in the formation of a polar body.

D. The secondary follicle transforms into a tertiary follicle which is characterized by a fluid-filled cavity called the antrum.