The bending equation is
A. $$\frac{{\text{M}}}{{\text{I}}} = \frac{\sigma }{{\text{y}}} = \frac{{\text{E}}}{{\text{R}}}$$
B. $$\frac{{\text{T}}}{{\text{J}}} = \frac{\tau }{{\text{R}}} = \frac{{{\text{C}}\theta }}{{\text{I}}}$$
C. $$\frac{{\text{M}}}{{\text{R}}} = \frac{{\text{T}}}{{\text{J}}} = \frac{{{\text{C}}\theta }}{{\text{I}}}$$
D. $$\frac{{\text{T}}}{{\text{I}}} = \frac{\tau }{{\text{J}}} = \frac{{\text{R}}}{{{\text{C}}\theta }}$$
Answer: Option A
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