A region in the `x-y`
plane is bounded by the curve `y=sqrt(25-x^2)`
and the line `y=0`
. If the point `(a ,a+1)`
lies in the interior of the region, then
`a in (-4,3)`
(b) `a in (-oo,-1) in (3,oo)`
`a in (-1,3)`
(d) none of these
A. `a in (-4,3)`
B. `a in (- oo,-1) in (3, oo)`
C. `a in (-1),3)`
D. none of these