Capacitor A has a capacity of 15 `mu` F when it is filled with a medium of dielectric constant 15. Another capacitor B has a capacity of 1 `mu` F with air between the plates. Both are charged separately by a battery of 100 V. After charging, both are connected in parallel without the battery and the dielectric removed. Then the common potential is :

Options

A. 0.01 V
B. 1 V
C. 100 V
D. 800 V