Lin Shuhao is a famous basketball star is playing in the NBA . A whichB who C when D where

问题补充：

Lin Shuhao is a famous basketball star is playing in the NBA .

A whichB who C when D where

答案：

解析：which 哪一个；who谁； when什么时候；where在哪儿。先行词a famous basketball star之人，为下文逻辑主语，故引导词用who，选B。