Two coherent sources separated by distance d are radiating in phase having wavelength `lambda`. A detector moves in a big circle around the two sources in the plane of the two sources. The angular position of `n=4` interference maxima is given as
A. `sin^(-1)((nlamda)/(d))`
B. `cos^(-1)((4lamda)/(d))`
C. `tan^(-1)((d)/(4lamda))`
D. `cos^(-1)((lamda)/(4d))`
