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The basic key to prevention of infectious diseases is:
AStrong drugs
BLong sleep
CPublic hygiene
DPrivate wealth
Answer & Solution
Correct answer: C. Public hygiene
1. Avoid crowding, treat water, stop mosquito breeding.
2. Public hygiene is the basic key.
3. Prevention is better than cure.
_Source: NCERT Class 9 Science, Chapter 13, Why Do We Fall Ill._
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