2177. 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 September 7, 2025 by Admin A. (5/6) (r/1 + r²) M B. (5/6) (r²/1 + r²) M C. (5/6) (r²/1 + r3) M D. (5/6) (r²/1 + r4) M ✅ The correct answer is option D.