[单选题]
When light illuminates a4i gqm y 56lb 2zy0 tp5:+hqu:yi*cnbt grating with e.y /fhx.ij waf0c+ sqav0n(27000 lines per centimeter, its second order maxx+/cysqfaf.ei0hj n 2 vw.(a0 imum is at $62.4^{\circ}$. What is the wavelength of the light?
A. $336 \; nm$
B. $363 \; nm$
C. $633 \; nm$
D. $752 \; nm$
