1.

Atul noticed that the joints of the main door of his house produce a noise every time the gate is opened or closed. He wants to reduce the sound by applying something to the joints. To reduce the noise of the door, Ami must

A.  Drop water in the joints                    
B.  Spread sand on the joints
C.  Apply grease on the joints        
D.  Put chalk powder on the joints
Answer» D.  Put chalk powder on the joints


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