If \(\vec{a}+\vec{b}+\vec{c}=0\) and \(|\vec{a}|=4, \ |\vec{b}|=3, \ |\vec{c}|=\sqrt{37}\) then the angle between \(\vec a\) and \(\vec b\) is :

• A. 30°
• B. 45°
• C. 60°
• D. 90°