Refractive index depends upon <br> (1) Nature of the medium<br> (2)Wavelength of the light <br> (3) Temperature <br>(4)Angle of incidence

Question

$\begin{array}{1 1} (a)\;\text{1 and 2} \\ (b)\; \text{2 and 4} \\ (c)\; \text{1, 2 and 3} \\ (d)\; \text{all the four } \end{array}$