THE BOY IS STUDYING IN HANOI. HIS MOTHER IS AWAY ON HOLIDAYA. THE B...

25.The boy is studying in Hanoi. His mother is away on holidayA. The boy that mother is away on holiday is studying in HanoiB. The boy whose mother is away on holiday is studying in HanoiC. The boy who mother is away on holiday is studying in HanoiD. The boy is studying in Hanoi whose mother is away on holiday