Pick up the correct statement from the following: A. For a uniformly distributed load, the shear force varies linearly B. For a uniformly distributed load, B.M. curve is a parabola C. For a load varying linearly, the shear force curve is a parabola D. All the above

The correct answer is D. All the above.

For a uniformly distributed load, the shear force varies linearly. This is because the shear force is equal to the load times the distance from the load to the support. For a uniformly distributed load, the load is constant, so the shear force is also constant.

For a uniformly distributed load, the B.M. curve is a parabola. This is because the B.M. is equal to the area under the shear force curve. For a uniformly distributed load, the shear force curve is a straight line, so the B.M. curve is a parabola.

For a load varying linearly, the shear force curve is a parabola. This is because the shear force is equal to the load times the distance from the load to the support. For a load varying linearly, the load is not constant, so the shear force is also not constant. The shear force curve is a parabola because the load is a linear function of the distance from the load to the support.