Let $A(h, k), B(1, 1)$ and $C(2, 1)$ be the vertices of a right angled triangle with AC as its hypotenuse. If the area of the triangle is 1, then the set of values which $'k'$ can take is given by :

Question

( A ) (1, 3)
( B ) (-3, -2)
( C ) (0, 2)
( D ) (-1, 3)