In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.
Occurring at night

Options

A. nightly
B. dark
C. neurotic
D. nocturnal

Answer

D

Explanation

nocturnal (Adj.) : active at night nightly (Adj.) : happening every night dark (Adj.): with no or little light neurotic (Adj.) : caused by or suffering from a mental illness with strong feelings of fear and worry