Statement–Courses of Action (conjunctivitis patterns around monsoons): Minor cases occur yearly near monsoon boundaries, but this year there is a major epidemic after about four years; decide which action(s) follow—(I) take precautionary measures only every four years, (II) advise people to drink boiled water during the rainy season—based on relevance to eye infections and timing.

Given data

• Pattern: Some conjunctivitis cases appear annually around monsoons; a major outbreak appears after ~4 years.
• Course I: Take precautions once every four years.
• Course II: Advise boiled water consumption during rains.

Concept / Approach
Measures must be relevant to conjunctivitis (an eye infection) and timely (every monsoon season, not quadrennially).

Step-by-step evaluation
Step 1: Course I misconstrues the pattern; precautions should be yearly around monsoons, not only once in four years.Step 2: Course II targets water-borne GI risks, not eye infection; it is off-topic for conjunctivitis control (which focuses on hygiene, avoiding contact, not sharing towels/eyewear, etc.).

Verification / Alternative check
Relevant actions would include public advisories on eye hygiene and prompt treatment—neither proposed course states this.

Common pitfalls

• Assuming any monsoon health advice is applicable to all monsoon ailments.

Final Answer
Neither I nor II follows.