In which of the following cases, there exists the situation of Pure Bending in some part of the beam or along the entire beam?

i) A simply supported beam subjected to two equally spaced downward concentrated loads

ii) A simply supported beam subjected to two equally spaced opposite moments

iii) A cantilever beam subjected to clockwise moment at free end

iv) An overhanging beam with both side overhangs subjected to different concentrated loads at both the free ends