Assertion–Reason (Common Cold and Drug Resistance):\nAssertion (A): There are no medicines to cure the common cold.\nReason (R): Over time, disease-causing bacteria and viruses become drug resistant.

Introduction / Context:
This item checks understanding of why the “common cold” (typically viral, e.g., rhinoviruses) lacks a specific curative drug in routine practice and clarifies misconceptions involving antibiotic resistance.

Given Data / Assumptions:

• A: No medicines cure the common cold outright; management is generally symptomatic (rest, fluids, analgesics, decongestants).
• R: Pathogens become drug resistant over time, implying resistance explains the lack of a cure.
• Note: Antibiotics target bacteria, not viruses; cold is viral. Antivirals for common cold are limited and not used as universal cures.

Concept / Approach:
Evaluate truth of A and R separately, then the explanatory link. The absence of a simple cure is due to virological diversity, rapid antigenic variation, self-limiting natural history, and limited cost–benefit of developing broad antivirals—not primarily because of resistance.

Step-by-Step Solution:
1) A: In standard clinical advice, no single curative medicine eradicates the common cold; supportive therapy is recommended. So A is true.2) R: While drug resistance is a real phenomenon (notably in bacteria; also in some viruses like HIV/flu), it is not the reason we lack a cure for the common cold. Thus, as an explanation for A, R is false.3) Relation: A true, R false.

Verification / Alternative check:
Public health guidance emphasizes prevention (hand hygiene) and symptomatic relief; antibiotics are ineffective against cold viruses and are discouraged.

Why Other Options Are Wrong:
(a)/(b) require R to be true; (d) flips truth values; “None” is redundant.

Common Pitfalls:
Assuming any infection without a cure must be due to resistance; confusing bacterial with viral pathogens; overgeneralizing antivirals.

Final Answer:
(A) is true, but (R) is false.