86.Given below are two statements, labeled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : Noise pollution is unwanted accumulation of noise in the atmosphere.Reason (R) : It interferes with communication.

87.The most contractile part of the human body is

88.Which of the following when taken by pregnant women, is found to be the cause of deformed children ?

89.Given below are two statements, labeled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : A refrigerator can cool a room if the door of the refrigerator is kept open and is placed in the middle of the room.Reason (R) : Refrigerator cools the room by taking heat away from it.

90.Given below are two statements, labeled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ? 1. Assertion (A) : Some bacteria can synthesise their own food. 2. Reason (R) : These bacteria have chloroplasts.