State which of the following statement is false ?

Options

A. If `A ={0,1,2,3},B={-3,-2,-1,0,1} and f:A rarr B ` is the mapping defined by `f(x)=x-3` for all `x in A`, then f is a one-one mapping
B. A constant mapping will be 0ne-one when its domain constans only one element.
C. Functions f and g are defined as follows:`f:RR-{2} rarrRR,` where `f(x)=(x^(2)-4)/(x-2) and g:RR rarrRR,` where `g(x)=x+2,` then `f=g`
D. `f(x)=sqrt(x^(2)+4x-1)` then `f(-2)` is not exist.

Answer

C