An object is placed at a distance of 10 cm. from a convex mirror of focal length 15 cm. The position and nature of the image are :
(A) 3 cm. inform of the mirror, real & erect
(B) 6 cm. behind the mirror, virtual & erect
(C) 9 cm. inform of the mirror, real & inverted
(D) 6 cm. behind the mirror, real & inverted