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Consider the following diseases : 1. Diphtheria 2. Chickenpox 3. Smallpox Which of the above diseases has/have been eradicated in India?

  1. (a)1 and 2 only
  2. (b)3 only
  3. (c)1, 2 and 3
  4. (d)None
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Official answer(b) 3 only