A thin cylindrical shell of internal diameter D is subject to an internal pressure 'p'. If y is the yield stress of the material of the cylinder, then based on the maximum shear theory, the thickness of the cylinder will be (in kg/cm2) is

• A. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/37-244-1.png">
• B. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/37-244-2.png">
• C. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/37-244-3.png">
• D. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/37-244-4.png">