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Which of the following conditions for the survival of corals are correct?

1. The water temperature must not fall below 20\[{}^\circ \]C

2. The depth of water should not exceed 30 fathoms

3. The salinity should be less than 10%

4. The water should be free from sediments

Select the correct answer from the codes given below:

A)  1 and 2                 

B)  3 and 4

C)  1, 2 and 3                         

D)  1, 2 and 4