Subject :IMO Class : Class 6
Arrange the following steps of construction of an angle 120° in a correct order.
Steps of construction:
(1) Draw a ray PQ.
(2) With B as a centre, again draw an arc to intersect the first arc at C.
(3) With P as a centre and a convenient radius, draw
an arc to intersect 
at A.
(4) Join CP to get the required angle. ∠CPQ measures 120°.
(5) With A as a centre, draw an arc with the same
radius to intersect the previous arc at B.
A(1)-(4)-(2)-(3)-(5)
B(1)-(3)-(5)-(2)-(4)
C(1)-(2)-(3)-(5)-(4)
D(1)-(3)-(2)-(5)-(4)