Correct Answer: Tear gas

Solution : The correct option is Tear gas .

Tear gas is a sort of chemical substance that is often employed for crowd control and riot control. While it is known to irritate the eyes and respiratory system, its primary use is to produce momentary pain, including tears, to disperse crowds or suppress protests. Tear gas is commonly composed of chemicals such as chlorobenzylidene malononitrile or chloroacetophenone. When used, these substances can induce eye, and respiratory tract irritation, resulting in symptoms such as tears, coughing, and skin irritation.