In the given figure,light is incident at an angle $\theta$ with the normal to a plane containing two slits of separation $d$. Select the expression that correctly describes the positions of the interference maxima in terms of the incoming angle $\theta$ and outgoing angle $\phi$.

• A
  $\sin \phi + \sin \theta = \left( m + \frac{1}{2} \right) \frac{\lambda}{d}$
• B
  $\sin \theta = m\lambda$
• C
  $\sin \phi - \sin \theta = (m + 1) \frac{\lambda}{d}$
• D
  $\sin \phi + \sin \theta = m \frac{\lambda}{d}$