A square hole is punched out of a circular lamina, the diagonal of the square being the radius of the circle. If r is the radius of the circle, the C.G. of the remainder from the corner of the square on the circumference will be__.

A)
r(π+0.25)/π-0.5
B)
r(π-0.5)/π+0.25
C)
r(π-0.25)/π-0.5
D)
r(π+0.25)/π+0.5

Correct Answer :   r(π-0.25)/π-0.5