A. I know where she lives.
B. I told him, what he wanted to know.
C. Tell me where she lives.
D. Her mother died when she was ten years old.
Explanation: 126; Pronoun এর objective form এর পর কোনো clause আসলে তা সাধারণত Noun clause হয়. When, Why, Where, How ইত্যাদি দ্বারা adverb clause শুরু হয়।