Downy mildew of vineyard can be controlled by

Options :
  1. DDT
  2. Bordeaux mixture
  3. both the above
  4. none of these
Answer and Explanation :-

Answer: Option 2

Explanation:

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Nothing is more natural than mutual misunderstanding the contrary is always surprising. I believe that one never agrees on anything except by mistake, and that all harmony among human beings is the happy fruit of an error.
-Paul Valéry The Art of Poetry