If the ratio of long and short spans of a two way slab with corners held down is r, the actual reduction of B.M. is given by

• A. <img src="/_files/images/civil-engineering/rcc-structures-design/76-13-92-1.png">
• B. <img src="/_files/images/civil-engineering/rcc-structures-design/76-13-92-2.png">
• C. <img src="/_files/images/civil-engineering/rcc-structures-design/76-13-92-3.png">
• D. <img src="/_files/images/civil-engineering/rcc-structures-design/76-13-92-4.png">
• E. none of these.