The value of $\tan 40^{\circ}+\tan 11^{\circ}+\tan 20^{\circ}-\tan 56^{\circ}+\tan 56^{\circ} \tan 11^{\circ}+\sqrt{3} \tan 40^{\circ} \tan 20^{\circ}$ is

• Correct answer
  A

  $\sqrt{3}-1$
• B

  $\sqrt{3}+1$
• C

  1
• D

  0

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