The Yellow Line of a Sodium Lamp Is Two Lines $\lambda$

Multiple Choice

The yellow line of a Sodium lamp is two lines very close together at $\lambda$ ₁ = 589.592 nm and $\lambda$ ₂ = 588.995 nm.A diffraction grating with 10,000 lines/cm is used to resolve the lines.What is the angular separation of the two lines for the first order diffraction?

A) 0.212 ^$\circ$
B) 0.0423 ^$\circ$
C) 0.0613 ^$\circ$
D) 0.0814 ^$\circ$
E) There is no angular separation.