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:

Which of the following conditions for the survival of corals are corre

1.	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
Answer» E.