Assertion (A): | For evolution of O2 in photosynthesis, PS-II is required. |
Reason (R): | PS II is reduced by pulling electrons from water due to which photolysis of H2O occurs. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
1. | Joseph Priestley | 2. | Jan Ingenhousz |
3. | Julius von Sachs | 4. | C. B. Van Neil |