Select the correct option based on statements below:
| Assertion (A): | Penicillin (G) is an antihistamine. |
| Reason (R): | Penicillin (G) is effective against gram-positive as well as gram-negative bacteria. |
| 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. |
Hint: Penicillin (G) is an antibiotic.
penicillins have a four-membered β-lactam ring and the β-lactam ring is itself fused to a five-membered thiazolidine ring. It is an antibiotic, not an antihistamine.
Penicillin works best on gram-positive bacteria by inhibiting peptidoglycan production, making the cells leaky and fragile.
Hence, both assertion and reason are wrong statements.
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