Choose one of the following options that means the opposite of the given word:
Gregarious

Choose one of the following options that means the opposite of the given word:
Stationary

Select the word or phrase which is closest to the $OPPOSITE$ in meaning of the highlighted word or phrase.
The members thought that the task was $feasible$.

Choose one of the following options that means the opposite of the given word:
Hollow

Choose one of the following options that means the opposite of the given word:
Liability

Select the word or phrase which is closest to the $OPPOSITE$ in meaning of the highlighted word or phrase:
It is one of $pernicious$ customs prevailing in the society.