A farmer notices that storing ripe mangoes with unripe ones speeds up the ripening process. The phytohormone primarily responsible for this phenomenon is:

1. Auxins
2. Cytokinins
3. Gibberellins
4. Ethylene

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

The diagram given below is that of a Neutrophil. The function is …………… :

1. Secreting hormone
2. Transporting food
3. Phagocytosis
4. Producing antibodies