A mixture of 450-nm and 900-nm light is incident on a diffraction grating. Which of the following is true? 

A. all lines of the 900-nm light coincide with even order lines of the 450-nm light 

B. all lines of the 450-nm light coincide with even order lines of the 900-nm light 

C. all lines of the 900-nm light coincide with odd order lines of the 450-nm light 

D. None of the lines of the 450-nm light coincide with lines of the 900-nm light 

E. All of the lines of the 450-nm light coincide with lines of the 900-nm light