In Young’s double-slit experiment, the distance between the two identical slits is$6.1$ times larger than the slit width. Then the number of intensity maxima observed within the central maximum of the single-slit diffraction pattern is :

• A

  $3$
• B

  $6$
• C

  $24$
• Correct answer
  D

  $12$

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