please explain urgently

Dear Student, Out of these only 3 pairs are correct. (a)There is no role of RuBP in citric acid cycle . (b)PGA is one of main components of calvin cycle ,(c) in Hatch slack pathway first stable molecules is acid having 4 carbon . (d)In z scheme H2O breaks to evolve oxygen and (e)in ETS there is break down of NADPH2 to form ATP not its formation. Hence its correct answer is option 1 (that is 3 pairs). Regards.