The width of the rib of a T-beam, is generally kept between

• A. <img src="/_files/images/civil-engineering/rcc-structures-design/73-13-49-1.png">
• B. <img src="/_files/images/civil-engineering/rcc-structures-design/73-13-49-2.png">
• C. <img src="/_files/images/civil-engineering/rcc-structures-design/73-13-49-3.png">
• D. <img src="/_files/images/civil-engineering/rcc-structures-design/73-13-49-4.png">