Statement — Conjunctivitis occurs every year around the monsoon, but this year it appears to be a major epidemic, the worst in four years. Courses of Action — I. Take precautionary measures every four years to check the epidemic. II. 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.