option d.
it will sweep horizontal distance equal to circumfrence=2*pi*r=2*pi*5=10pi
now, distance of point Q from P(using pythagoras)=sqrt(12^2 + 5^2)=13..
now during it course of journey, it will form circular arc, where
'P' being center of arc, '10pi' being length of arc and '13' being radius of circular arc..
now using formula for circular arc i.e
theta = l/r
theta = 10pi/13...
i will suggest you first draw a proper diagram, then you will get exactly what i have done..