A charge `+Q` is uniformly distributed along the circular arc of radius `R` as shown in the figure.The magnitude of the force experienced by the point charge `+q` place at the centre of curvature is `(k=(1)/(4piepsilon_(0)))`
A. `(kQqsin""(theta)/(2))/(R^(2)theta)`
B. `(2kQqsin""(theta)/(2))/(R^(2)theta)`
C. `(2kQqcos""(theta)/(2))/(R^(2)theta)`
D. `(2kQqtan""(theta)/(2))/(R^(2)theta)`