An Initially Uncharged Hollow Metallic Sphere with Radius of 5

Multiple Choice

An initially uncharged hollow metallic sphere with radius of 5 cm has a small object with a charge of +15 µC carefully placed at the center of the sphere through a hole in the latter's surface.What charge resides inner surface of the sphere?

A) -2 000 µC
B) -15 µC
C) +15 µC
D) zero
E) ​+2 000