[单选题]
Three monochromatic light sc/2snh wcgco 3rh:wu)+ 8h,qdo( vieep:py vt3f,* i:xurces, $K$, $L$, and $N$, are incident on a single slit separately. The diagram shows obtained diffraction patterns on the screens for each light source along with the relative widths of their central maxima.
In which option are the possible colors of the light sources given correctly?
A. $K$ is red;$L$ is green;$N$ is violet
B. $K$ is green;$L$ is violet ;$N$ is red
C. $K$ is violet;$L$ is red;$N$ is green
D. $K$ is violet;$L$ is green;$N$ is red
