Question

Assertion : Auditory ossicles are small bones present in the cavity of inner ear.

Reason : Auditory ossicles maintain the balance of air pressure between two sides of ear drum.

(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (d) A and R are false

Explanation :

Auditory ossicles arc three small bones present in the middle ear. These three car ossicles are malleus, incus and stapes and are attached to each other. Their function is to increase the intensity of sound waves. The cavity of middle ear communicates with that of pharynx through the air tilled tube called Eustachian tube. The Eustachian tube maintains the balance in the air pressure between two sides of the ear drum and thus allows it to vibrate freely when sound waves impinge on it.