The correct formula for calculating superelevation for the hill roads, is

• A. <img src="/_files/images/civil-engineering/highway-engineering/49-16-329-1.png">
• B. <img src="/_files/images/civil-engineering/highway-engineering/49-16-329-2.png">
• C. <img src="/_files/images/civil-engineering/highway-engineering/49-16-329-3.png">
• D. <img src="/_files/images/civil-engineering/highway-engineering/49-16-329-4.png">