White blood corpuscles divide by

Which of the following options gives the correct sequence of events during mitosis?

Which of the following statements is correct?

Statement $P$: The phase between two successive meiotic divisions is called interkinesis.
Statement $Q$: The period between two successive cell divisions is called the cell cycle.

$X$-bodies were discovered by:

During cell division,sometimes there will be failure of separation of sister chromatids. This event is called