[单选题]
A spherical mirror on wh e4)o ;arvmhm)ich reflection takes place or(zvyj ( ;eoznd* :v3d7r;h zvn the inner surface of the sphere is referr( ;vzrd*vye(r 3vz7;h: ndoz jed to as a
A. convex mirror.
B. concave mirror.
C. plane mirror.
D. double-sided mirror.
