Question

Door locks are made of metals because metals
(A) Are Opaque
(B) Are good conductors of heat
(C) Are hard and strong
(D) Have luster​

Answer 1

(c) hard and strong

hope it is helpful

Answer 2

Answer:

The internal mechanisms of locks are generally made of brass or die-cast zinc. The cam, which is the tongue that protrudes from the lock to secure it, is usually made of steel or stainless steel. The outer casing of a lock may be made of brass, chrome, steel, nickel or any other durable metal or alloy.

option-{C}