What type of placenta is found in humans?

Foetal ejection reflex in human female is induced by

Which of the following structures is found in the blastula?

Which of the following statements is correct regarding the morula in humans?

In the given figure,after how many days of fertilization is the part labeled as $f$ formed?

$A$ : The morula passes through the phase of compaction,producing two major types of cells: the peripheral cells and the inner cell mass.
$R$ : The descendants of the inner cell mass become the trophoblast cells.