Check the correct statements on scattering of light
`S1`: Rayleigh scattering is responsible for the bluish appearance of sky
`S2`: Rayleigh scattering is proportional to `1//lambda^(4)` when the size of the scatterer is much less than `lambda`
`S3`: Clouds having droplets of water (large scattering objects) scatter all wavelengths are almost equal and so are generally white
`S4`: The sun looks reddish at sunset and sunrise due to Rayleigh scattering
A. S1 only
B. S1 and S2
C. S2 and S3
D. S1, S2, S3 and S4
