| Assertion (A): | SA node induces excitatory impulses, when blood is poured by pulmonary veins in the left ventricle. |
| Reason (R): | SA node is self excitatory. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explains (A) |
| 3. | (A) is False but (R) is True |
| 4. | Both (A) and (R) are False |
| Assertion (A): | Human heart is myogenic. |
| Reason (R): | Entire human heart is made up of a cardiac muscles. |
| 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. |