Everybody was astonished when he used such a profane language.

Answer: Option A

Profane : not relating to that which is sacred or religious; secular.
Sacred : connected with God or a god or dedicated to a religious purpose and so deserving veneration.
Pure : not mixed or adulterated with any other substance or material.
Profound : (of a state, quality, or emotion) very great or intense.
High : of great vertical extent.

Antonym of Profane is Sacred