[单选题]
A diffraction grating has 5000yg2k 5(o0p2 cvieic6y lines per cm. The angle between thedlogrfr;te b1r(:z m-dh9pq/81 o6kk central maximum and the fourth order maxdt1oekr98/hmo pf;l (r-zg k6q: 1rbdimum is $47.2^{\circ}$. What is the wavelength of the light?
A. $138 \; nm$
B. $183 \; nm$
C. $367 \; nm$
D. $637 \; nm$
