Question -
Answer -
If we revolve one completeround in either clockwise or anti-clockwise direction, then we will revolve by360º and the two adjacent directions will be at 90º or 
of a complete revolutionaway from each other.
(a) If we start facingEast and make 
of a revolution clockwise, thenwe will face the West direction.
(b) If we start facingEast and make 
of a revolution clockwise, thenwe will face the West direction.
(c) If we start facingWest and make 
of a revolution anti-clockwise,then we will face the North direction.
(d) If we start facingSouth and make a full revolution, then we will again
face theSouth direction.
In case of revolving by 1complete round, the direction in which we are revolving does not matter. Inboth cases, clockwise or anti-clockwise, we will be back at our initialposition.