According to IS : 800 - 71, the minimum thickness of a vertically stiffened web plate, shall not be less than

• A. <img src="/_files/images/civil-engineering/steel-structure-design/106-14-168-1.png">
• B. <img src="/_files/images/civil-engineering/steel-structure-design/106-14-168-2.png">
• C. <img src="/_files/images/civil-engineering/steel-structure-design/106-14-168-3.png">
• D. <img src="/_files/images/civil-engineering/steel-structure-design/106-14-168-4.png">
• E. none of these.