Assertion (A): Oxygen is produced during light dependent reactions of photosynthesis.

Reason (R): Oxygen is released as a byproduct during photolysis.

1. (A) is true and (R) is false.
2. (A) is false and (R) is true.
3. Both (A) and (R) are true and (R) is the correct explanation of (A).
4. Both (A) and (R) are true but (R) is not the correct explanation of (A).

Reena gets emotionally stressed when the school examinations are approaching. Which hormone is responsible for this condition?

1. Adrenaline
2. Thyroxine
3. Insulin
4. Growth hormone

Assertion (A): Pituitary gland is known as the master gland.

Reason (R): It regulates the activities of other exocrine glands.

1. (A) is true and (R) is false.
2. (A) is false and (R) is true.
3. Both (A) and (R) are true and (R) is the correct explanation of (A).
4. Both (A) and (R) are true but (R) is not the correct explanation of(A).

Aruna went to a theatre to watch a movie on a bright sunny morning. As she came out of the theatre, she felt a dazzling effect and could not open her eyes. After a few minutes her vision became normal. This is due to:

1. Accommodation of eye
2. Mutation
3. Polarisation
4. Adaptation of eyes