The periodic time of one oscillation for a simple pendulum is(where l = Length of the pendulum.)

• A. <img src="/_files/images/mechanical-engineering/engineering-mechanics/45-255-1.png">
• B. <img src="/_files/images/mechanical-engineering/engineering-mechanics/45-255-2.png">
• C. <img src="/_files/images/mechanical-engineering/engineering-mechanics/45-255-3.png">
• D. <img src="/_files/images/mechanical-engineering/engineering-mechanics/45-255-4.png">