I am confused which of the below sentences is correct.
- I know which book Roy sent to me belongs to Tomy.
- I know the book that Roy sent to me belongs to Tomy.
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- I know which book Roy sent to me belongs to Tomy.
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- I know the book that Roy sent to me belongs to Tomy.
I think both of these aboveare correct.the defference The difference is that the first sentence is Nouncontains a noun clause and another one, the second an adjective clause. What What is differentthe difference in meaning is unknown to me.?