| Assertion(A): | Very low concentration of a bacteria or viruses, at the time when the symptoms of the disease are not yet visible, can be detected by PCR. |
| Reason(R): | PCR causes amplification of the nucleic acids. |
| 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. |