Question

AB and AC are two Chords of a circle with centre O. M and N are the mid points of the chords respectively. The line OM and ON are extended which intersects the circum-circle at ‘R’ and ‘Y’. ‘S’ is a point on major arc RY. If angle A = 50˚ then Find angle RSY?

A 50˚
B 130˚
C 65˚
D 75˚
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