The four major steps in seeing an object are:

i. interpretation by the brain.

ii. focussing of image.

iii. entry of light rays.

iv. transmission of nerve impulses from the retina & brain.

The correct sequence will be:

1. i, ii, iii, iv
2. ii, iii, iv, i
3. iii, ii, iv, i
4. iv, i, ii, iii

Kathak is an Indian classical dance which involves a lot of spinning by the dancers. The learners of this dance experience dizziness in the beginning while spinning.

(a) Name the part of the membranous labyrinth responsible for this dizziness.

(b) Give a suitable reason for your answer.

(c) Mention the nerve that carries the impulse for dizziness to the brain.

The ear ossicle that transports sound vibrations to the inner ear:

1. Stapes
2. Malleus
3. Incus
4. Cochlea