Elimination approach:
(A) dark acidification is the nightly build-up of malic acid seen specifically in CAM plants. (B) fatty acid or lipid synthesis in plant cells is carried out mainly on the smooth endoplasmic reticulum. (C), the light-driven splitting of water that releases oxygen, is the classic Hill reaction. (D), the enzyme that can catalyse oxygenation of RuBP and thereby initiate photorespiration, is Rubisco. (E), the step that regenerates the CO2 acceptor RuBP to keep the cycle running, belongs to the Calvin cycle. Matching each process to its correct term and reading off the corresponding roman numerals against the given List-II gives (A)-(II), (B)-(I), (C)-(IV), (D)-(V), (E)-(III), confirming this option.