Find the next two terms in the series

J, L, O, S, ?, ?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
efg _ _ eff _ ghhe _ eff _ gggh _ h

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
DK, FN, HQ, ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

L, O, Q, T, V, ?

Which one set letters when sequentially placed at the gaps in the given letter series shall complete it?

M__OMMN__M__NOMMN__M

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
HANDSOME

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
C11, V17, O23, ?

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
Biological