Correct Answer: D
Explanation:
Sol. Dry Ice – We can simply say that Dry ice is solid Carbon dioxide CO_2. It is used as a cooling agent.
Mustard gas – It is used as a strong chemical weapon. This mortally chemical affects skin, leering eye, lungs and D.N.A. which affects the cells most. After 1-6 hours the symptoms seem to be visible.
Teflon – Its commercial name is Polytetra Fluoroethylene. It has been registered in 1944. It is synthesized fluoropolymer in which fluorine atom is mixed. So Teflon is a Fluorine containing the polymer.
Fullerene – Fullerene is an allotrope of the carbon family in which fully carbon atoms are integrated. It is denoted by C_60. In 1985, at Rice University the name ‘Fullerene’ was given by St. Richard Buckminster. Fullerene is an Allotrope of Carbon.