If $|\vec{a}|=2,|\vec{b}|=5$ and $|\vec{a} \times \vec{b}|=8$, then what is $\vec{a} \cdot \vec{b}$ equal to?

• Correct answer
  A

  6
• B

  7
• C

  8
• D

  9

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