[" B.A spherical mirror ond thin spherical lens "],[" have each focal length of "-15cm" the miror "],[" ond the fons are "0" likely to be "],[" (a) Both concave "],[" (s) Both con yex "],[" (c) mirrover is concave,lens is conxex "],[" (o) Pirroor is convex lems is concale "]