List-I contains primary phenomenon related to light which are needed to explain various events and applications given in List-II
`{:(,"List-I",,"List-II",),((P),"Continuosly varying refractive index of medium",(1),"Looming",),((Q),"Dispersion of Light",(2),"Step index optical fibre.",),((R),"Total internal Reflection",(3),"Formation of Rainbow",),((S),"Scattering of Light",(4),"Blue colour of sky",):}`

Options

A. `{:(P,Q,R,S),(3,1,4,2):}`
B. `{:(P,Q,R,S),(4,3,2,1):}`
C. `{:(P,Q,R,S),(1,3,2,4):}`
D. `{:(P,Q,R,S),(1,2,3,4):}`

Answer

C