Answer with explaining why this is most appropriate option.

Dear student, 

Ans 14. The eggs are categorised , either on the basis of :
1.amount of yolk (alecithal/oligolecithal, microlecithal, mesolecithal and macrolecithal),or
2.distribution of yolk(Isolecithal, centrolecithal and telolecithal).

The eggs of insects are centrolecithal, i.e., yolk is present at the centre with cytoplasm around it.
Hence, option D is correct.

Regards.