If permissible compressive stress in concrete is 50 kg/cm2, tensile stress in steel is 1400 kg/cm2 and modular ratio is 18, the depth d of the beam, is

• A. <img src="/_files/images/civil-engineering/rcc-structures-design/78-13-113-1.png">
• B. <img src="/_files/images/civil-engineering/rcc-structures-design/78-13-113-2.png">
• C. <img src="/_files/images/civil-engineering/rcc-structures-design/78-13-113-3.png">
• D. <img src="/_files/images/civil-engineering/rcc-structures-design/78-13-113-4.png">
• E. <img src="/_files/images/civil-engineering/rcc-structures-design/78-13-113-5.png">