In rainy season, on a clear night the black seat of a bicycle becomes wet because

In rainy season, the doors get wet due to

During rainy season wooden doors warp and become difficult to open or to close because of ...........

During the rainy season ground surface become slippery due to

In rainy season , the speed of sound increases because density of medium

Assertion (A): In rainy season, common salt becomes damp after sometime on keeping. Reason (R ): Common salt (NaCI) is hygroscopic in nature.

Assertion (A): In rainy season, common salt becomes damp after sometime on keeping. Reason (R ): Common salt (NaCI) is hygroscopic in nature.