Two unequal arcs of a circle make two an...

Two unequal arcs of a circle make two angles at the centre which are in the ratio 3 : 5 and the greater angle in degree is `75^@`, then the circular measure of smaller angle is

A

`(Pi^c)/(2)`

B

`(Pi^c)/(3)`

C

`(Pi^c)/(4)`

D

`(Pi^c)/(6)`.

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