There were eighteen pandas to choose from for the Taiwanese, ________ were the couple also from the protection garden．

1. A.
   the most lovable of whom
2. B.
   but the most lovable of which
3. C.
   of which the most lovable
4. D.
   the most lovable of them

There were eighteen pandas to choose from for the Taiwanese,      _____were the couple also from the protection garden．

A．the most lovable of whom              B．but the most lovable of which

C．of which the most lovable                D．the most lovable of them