Given the venn diagram below, which statement must be false?

an irrational number is also a real number.
some rational numbers are not integers.
some natural numbers are not integers.
all whole numbers are rational numbers.

       This was a tricky question for me to answer, but I believe that the false statement is the 3rd option: Some natural numbers are not integers. I think that all natural numbers are integers because integers include positive AND negative numbers. All positive, whole numbers are natural numbers and integers can be positive, whole numbers. Integers cannot be fractions in their most simplified form. 

Ithink your answer is b