Read the following statements regarding the physiological and cellular events occurring around the 14th day of a normal 28-day menstrual cycle: (A) A rapid decline in estrogen secretion by the growing follicles triggers the LH surge. (B) The primary oocyte completes its first meiotic division inside the tertiary follicle. (C) The corpus luteum secretes large amounts of progesterone prior to ovulation. (D) The Graafia

Step-by-step solution

Statement (A) is incorrect because a high concentration (peak) of estrogen exerts a positive feedback on the pituitary, triggering the LH surge, not a decline in estrogen. Statement (B) is correct according to NCERT; the primary oocyte completes its first meiotic division within the tertiary follicle, which then matures into the Graafian follicle. Statement (C) is incorrect because the corpus luteum is formed from the remnants of the Graafian follicle only after ovulation has occurred. Thus, it secretes progesteron