Which of the following is not a benefit of swimming?
a) joints supported in water
b) full body exercise
c)good exercise for cross training
d) burn less than 400 calories per hour

Burning less than 400 calories per hour is not the correct about the benefit of swimming. So option “D” is the correct option. In reality a person burns between 450 to 900 calories per hour while swimming. Swimming actually helps in the full body exercise of a person. This proves that option “B”” is not applicable. Swimming is also a great exercise for cross country training and so option “C” also is removed. Option “A” cannot be applied for this question as maximum number of joints are supported by the water.

The correct option is going to be D 

Sodium is the answer

A. i may be wrong i really don’t know