If -2<a<11 and 3<b<12, then which of the following is not true?

A 1<a+b<23

B -14<a-b<8

C -7<b-a<14

D 1<b+a<23

Correct Answer: Option C

In a right angled triangle, the radius of the incircle is given by the following relation .

As the given triangle is a right angled triangle, radius of its incircle

= 2 units.