Given that ' ' is the angle of internal friction, 'p' is the safe bearing capacity and is the unit weight of soil, the minimum depth of foundation of a masonry footing is given by

• A. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/50-883-1.png">
• B. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/50-883-2.png">
• C. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/50-883-3.png">
• D. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/50-883-4.png">