Statement $I:$ In a typical transistor, all three regions emitter, base and collector have same doping level.
Statement $II:$ In a transistor, collector is the thickest and base is the thinnest segment.
In the light of the above statements, choose the most appropriate answer from the options given below.
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$(a)$ Velocity of light in the second medium is $1.73$ times the velocity of light in the $I$ medium
$(b)$ Velocity of light in the $I$ medium is $1.73$ times the velocity in the $II$ medium
$(c)$ The critical angle for the two media is given by $\sin \,{i_c}\, = \,\frac{1}{{\sqrt 3 }}$
$(d)$ $\sin \,{i_c}\, = \,\frac{1}{2}$
