With usual notations the depth of the neutral axis of a balanced section, is given by

• A. <img src="/_files/images/civil-engineering/rcc-structures-design/70-13-10-1.png">
• B. t/mc = n/(d-n)
• C. <img src="/_files/images/civil-engineering/rcc-structures-design/70-13-10-3.png">
• D. <img src="/_files/images/civil-engineering/rcc-structures-design/70-13-10-4.png">