Two polaroids are placed in the path of unpolarized beam of intensity `I_(0)` such that no light is emitted from the second polarid. If a third polaroid whose polarization axis makes an angle `theta` with the polarization axis of first polaroid, is placed between these two polariods then the intensity of light emerging from the last polaroid will be

Options

A. `(I_0/8)sin^2 2theta`
B. `(I_0/4)sin^2 2theta`
C. `(I_0/2)cos^4theta`
D. `I_0cos^4theta`