A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is

• A. <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/152-64-2.png">
• B. <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/152-64-3.png">
• C. <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/152-64-4.png">
• D. <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/152-64-5.png">