With reference to human beings,find out the mismatch pair.

Which of the following statements are true about the female reproductive system?
$(A)$ Both estrogen and progesterone are necessary for development of follicle
$(B)$ Progesterone production is under the control of $LH$
$(C)$ The part of the oviduct is isthmus; has a narrow lumen and it joins the uterus
$(D)$ During pregnancy all events of the menstrual cycle stop and there is no menstruation
$(E)$ The graafian follicle ruptures to release the primary oocyte from the ovary by the process called ovulation

$A$: Most birds possess only the left ovary and left oviduct for conveying the ovum released from the ovary.
$R$: The avian ovary does not form a corpus luteum from the ruptured ovarian follicle which undergoes rapid shrinkage.

Two offspring developed in the same uterus but from the fertilization of two different ova are:

For what primary purpose is the call of the cuckoo heard during the rainy season?

Rapid secretion of $LH$ in ovulation causes