An unpolarised beam of light incidents on a group of three polarising sheets arranged such that the angle between the axes of any two adjascent sheets is $30^{\circ}$. The ratio of the intensities of polarised light emerging from the second and third sheets is

• A

  $1: 1$
• B

  $2: 1$
• Correct answer
  C

  $4: 3$
• D

  $3: 2$

Hence, the correct answer is option: 'C'.