The above figure shows the three coplaner forces P, Q and R acting at a point O. If these forces are in equilibrium, then

• A. <img src="/_files/images/mechanical-engineering/engineering-mechanics/26-37-2.png">
• B. <img src="/_files/images/mechanical-engineering/engineering-mechanics/26-37-3.png">
• C. <img src="/_files/images/mechanical-engineering/engineering-mechanics/26-37-4.png">
• D. <img src="/_files/images/mechanical-engineering/engineering-mechanics/26-37-5.png">