ANS:B - 45°

The zone in which transverse bending is likely to occur in a column can be obtained by drawing a line from the faces of the column making an angle θ with the horizontal. This angle is typically chosen based on the anticipated pattern of loading and structural behavior. While there is no universally fixed angle θ for all cases, commonly used angles are 30∘, ∘45∘, and 60∘. These angles correspond to different assumptions about the distribution of load and the expected behavior of the column. However, the specific angle θ can vary depending on the structural design requirements, loading conditions, and engineering judgment. Therefore, none of the provided options (45∘, 60∘60∘) are universally applicable, and the choice of angle θ should be made based on the specific context of the structural analysis and design.