1. He STILL LIVED there when our father died (A)B. is incorrect order for that adverb
C is passive voice, and "live" is intransitive
D is WERE and "he" needs WAS
2. When I last saw him, he WAS LIVING in London (C)
"a" and "d" are present perfect, but you saw him some time AGO (no connection with present)
"b" is present continuous (NOW) and it doesn �t make sense either
Cheers