Choose the word that is opposite in meaning to the

Find the word with the appropriate similar meaning of the word in Italic from the options given:

His jovial demeanor brightened up the room.

Choose the synonym of Efficacy 

Fear of people or society

Select the correct SYNONYM of the given word.

atrocious

Select the most appropriate antonym of the given word.

SPARSE

Choose the one which best expresses the meaning of the given word .

Melancholy

Select the most appropriate synonym of the given word.

Confusion

Nonplussed

Select the most appropriate antonym of the given word.

EMACIATED