Are the decomposers heterotroph or organotroph

if suppose in the options both the choices are present them which option will be more appropriate

To be specific decomposers are actually chemoorganoheterotrophs, a sort of mix between the two. An organotroph is an organism which obtains electrons from certain biochemical substrates and a heterotroph is an organism which can't perform carbon fixation and obtains its' energy from organic matter. A decomposer does both of these things, hence the term chemorganoheterotroph.

If given a choice between the two though your best bet is organotroph. Decomposition is the degredation of organic matter through either chemical or physical processes. Chemical processes are often more present in nature. Heterotrophs, in this case, are more like scavengers. Since the decomposition occurs from the inside out by breaking down of organic substrates, and organic substrates are broken down through the transfer of electrons, your best best is organotroph honestly.