$\vec{a}+\vec{b}+\vec{c}=\overrightarrow{0}$ such that $|\vec{a}| 3,|\vec{b}|=5$ and $|\vec{c}|=7$. What is $|\vec{a}+\vec{b}|$ equal to?

• Correct answer
  A

  7
• B

  8
• C

  10
• D

  11

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