A. Shark and sucker fish-commensalism
B. Algae and fungi in lichens-parasitism
C. Orchids growing on trees-epiphytism
D. Cuscuta (doder) growing on other flowering plants-epiphytism
The correct answer to the question: "Which one of the following is not a matching pair of certain organism/s and the kind of association?" is "Algae and fungi in lichens-parasitism".