Which of the following chemicals is also known as lachrymatory agent or lachrymator? 

Answer: [B] Tear gas

Tear gas is also known as CS Gas. It acts as a lachrymatory agent. Tear gas irritate the mucous membrane of the eyes, nose, mouth and lungs, and causes tearing, coughing, burning and difficult breathing.

This question is a part of GKToday's Integrated IAS General Studies Module