The number of sigma $\left(\mathrm{\sigma }\right)$ and pi $\left(\mathrm{\pi }\right)$ bonds in pent- $2$ -en- $4$ -yne is:

• Correct answer
  A

  $10\mathrm{ }\mathrm{\sigma }$ bonds and $3\mathrm{ }\mathrm{\pi }$ bonds
• B

  $8\mathrm{ }\mathrm{\sigma }$ bonds and $5\mathrm{ }\mathrm{\pi }$ bonds
• C

  $11\mathrm{ }\mathrm{\sigma }$ bonds and 2 $\mathrm{ }\mathrm{\pi }$ bonds
• D

  $13\mathrm{ }\mathrm{\sigma }$ bonds and no $\mathrm{\pi }$ bonds

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