The velocity factor for ordinary cut gears operating at velocities upto 12.5 m/s is equal to

• A. <img src="/_files/images/mechanical-engineering/machine-design/601-536-1.png">
• B. <img src="/_files/images/mechanical-engineering/machine-design/601-536-2.png">
• C. <img src="/_files/images/mechanical-engineering/machine-design/601-536-3.png">
• D. <img src="/_files/images/mechanical-engineering/machine-design/601-536-4.png">