What is the percentage of water in the human body?

Arrange the following elements in descending order of their contribution to percentage weight of the human body.
$(a)$ Oxygen
$(b)$ Carbon
$(c)$ Hydrogen
$(d)$ Nitrogen
Choose the correct answer from the options given below:

Which information is obtained by elemental analysis?

In nature,organic compounds invariably contain

What is the approximate percentage of water in the human body (in $\%$)?

Which of the following elements is present in negligible amounts in the human body?