JEE Main 2019 Physics question

A system of three polarizers , , is set up such that the pass axis of is crossed with respect to that of . The pass axis of is inclined at 60º to the pass axis of . When a beam of unpolarized light of intensity is incident on , the intensity of light transmitted by the three polarizers is I. The ratio (/I) equals (nearly):

• (A)10.67Correct
• (B)5.33
• (C)16.00
• (D)1.80