The breadth of a room is twice its height and is half of its length. The volume of room is `512 dm^3`. Its dimensions are :

Options

A. 16 dm,8 dm, 4 dm
B. 12 dm, 8 dm, 2 dm
C. 8 dm, 4 dm, 2 dm
D. 10 dm, 15 dm, 20 dm