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Which of the following statement is wrong?

In the theory of simple bending, the assumption is that the plane sections before bending remains plane after bending.
In a beam subjected to bending moment, the strain is directly proportional to the distance from the neutral axis.
At the neutral axis of a beam, the bending stress is maximum.
The bending stress in a beam is inversely proportional to the section modulus.

Correct Answer: At the neutral axis of a beam, the bending stress is maximum.

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