The term blastocyst is applied to the blastula of which one of the following

The events of the menstrual cycle are represented below. In which of the following option the level of $FSH$, $LH$ an progesterone is mentioned correctly

Which one of the following is the incorrect match of the events occurring during menstrual cycle?

Of the following animals which produces the smallest egg

$A$ : The male urethra is longer than the female urethra.
$R$ : It carries both urine as well as semen.

After a sperm has penetrated an ovum in the process of fertilization, entry of further sperms is prevented by