Question

closure property does not hold good for subtraction of whole numbers? true or false

Answer 1

 the subtraction of two natural numbers does not always result in a natural number, subtraction does not satisfy closure property.
so the given statement is false 

Answer 2

In closure property answer is always a whole number

closure property for subtraction is always not true.
e.g

1) 4- 3= 1
here 4 & 3 both are whole numbers & 1 is also a whole number
so here property is true

2) 3-4= -1
here 3 & 4 are whole numbers but -1 is not a whole number.
so here property is not true.

hope this will help you...