From which follicle will a secondary oocyte be released through ovulation?

Graafian follicle

Explanation:

Ovulation is the process observed in the females during which the females release the oocyte or the female egg cell. The process of ovulation takes place every month during the 14th day of the menstrual cycle.

The primary follicle is formed in the females before birth but after the puberty, each month the primary follicle matures into the secondary and then tertiary follicle called the Graafian follicle. This Graafian follicle releases the secondary oocyte.

Thus, Graafian follicle is the correct answer.