Statement — Conjunctivitis occurs every year around the monsoon, but this year it appears to be a major epidemic, the worst in four years.\n\nCourses of Action —\nI. Take precautionary measures every four years to check the epidemic.\nII. Advise people to drink boiled water during the monsoon season.

Introduction / Context:
The pattern described is seasonal (monsoon-linked) with an unusually severe episode this year. Precautions should be continuous during the risk season, not artificially tied to a four-year cycle. Public health advice should target hygiene behaviors that reduce transmission risk.

Given Data / Assumptions:

• Seasonality: monsoon periods see recurring cases.
• Severity: current year is a major epidemic after four years.
• COA I: schedule precautions only every four years.
• COA II: promote boiled/drinking safe water and hygiene during monsoon.

Concept / Approach:
COA I is illogical: the disease risk recurs annually; prevention must be seasonal and continuous (hand/eye hygiene, avoiding sharing towels/cosmetics, surface disinfection, safe water). COA II is sensible; while conjunctivitis transmits primarily via contact, overall monsoon hygiene (including safe water) correlates with reduced concurrent infections and promotes general outbreak control practices.

Step-by-Step Solution:

Verification / Alternative check:
Even if intensity spikes every few years, baseline annual precautions remain rational; therefore I does not follow.

Why Other Options Are Wrong:

Common Pitfalls:
Confusing episodic peaks with the need for only episodic precautions.

Final Answer:
Only II follows.