Which of the following statements are correct about sea water? Choose the correct answer from the options given below:

1.The density of sea water depends upon temperature, pressure and salinity.

2.Convergence of water has no effect on density.

3.The thermal expansion of water varies with the increase and decrease of temperature.

4.In the middle latitudes, due to an excess of precipitation the density is higher.

A1 and 4

B1 and 3

C2 and 3

D3 and 4

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