The ground state electronic configuration of CO molecule is

• Correct answer
  A

  $1 \sigma^{2} 2 \sigma^{2} 1 \pi^{4} 3 \sigma^{2}$
• B

  $1 \sigma^{2} 2 \sigma^{2} 3 \sigma^{2} 1 \pi^{2} 2 \pi^{2}$
• C

  $1 \sigma^{2} 2 \sigma^{2} 1 \pi^{2} 3 \sigma^{2} 2 \pi^{2}$
• D

  $1 \sigma^{2} 1 \pi^{2} 2 \sigma^{2} 2 \sigma^{2}$

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