I BORROWED HIS PEN, BUT I DON’T KNOW HIS NAME.A. I DON’T KNOW THE N...

2. I borrowed his pen, but I don’t know his name.

A. I don’t know the name of the boy who I borrowed his pen.

B. I don’t know the name of the boy which pen I borrowed.

C. I don’t know the name of the boy who pen I borrowed.

D. I don’t know the name of the boy his pen I borrowed.