Do these mean the same?
When he succeeded Plettner in 1981 , Karlheinz Kaske became the first chairman of the supervisory board not to be a member of the Siemens family .
When he was succeeded by Plettner in 1981 , Karlheinz Kaske became the first chairman of the supervisory board not to be a member of the Siemens family .

Options:
[a]. no;
[b]. yes;
[b].