A conducting sphere of radius R, carrying charge Q, lies inside an uncharged conducting shell of radius 2R. If they are joined by a metal wire,

• A

  Q/3 amount of charge will flow from the sphere to the shell

• B

  2Q/3 amount of charge will flow from the sphere to the sheel

• C

  Q amount of charge will flow from the sphere to the shell

• D

  Q/2 amount of charge will flow from the sphere to the shell