The correct options are:
a) radiation pressure is $\mathrm{l} / \mathrm{c}$ if the wave is totally absorbed
c) radiation pressure is $2 \mathrm{l} / \mathrm{c}$ if the wave is totally reflected
d) radiation pressure is in the range $I / \mathrm{c}<\mathrm{p}<2 \mathrm{I} / \mathrm{c}$ for real surface