A linearly polarized light beam of intensity I0 enters three successive ideal polarizers. The transmission axis of the first polarizer is 30∘ from the initial polarization direction. The second polarizer is 60∘ from the first, and the third is 90∘ from the first. What intensity emerges from the third polarizer?
a) 163I0
b) 0
c) 649I0
d) 83I0