I believe neither MOND nor Condensed Dark Matter are theories exactly, so much as they are schemata for classes of theories. Both are struggling to produce a verified theory that accounts for all observations, and while the latter is much more widely regarded as likely being correct, MOND has not been conclusively falsified to everyone's satisfaction. I would guess that there are, at least in principle, MOND theories which work for galaxy clusters but have residual discrepancies when applied to galaxies.
If this is so, then a multi-choice question which conflates one particular MOND theory for MOND itself, and which depends on the specifics of that particular theory for selecting the 'correct' answer, is problematic: for one thing, it may make selecting the 'correct' answer more difficult for a student who has specific knowledge about the topic. This is just one of several problems with multi-choice questions, though, fortunately, it does not seem to have any bearing on the very interesting phenomenon you have discovered.
If this is so, then a multi-choice question which conflates one particular MOND theory for MOND itself, and which depends on the specifics of that particular theory for selecting the 'correct' answer, is problematic: for one thing, it may make selecting the 'correct' answer more difficult for a student who has specific knowledge about the topic. This is just one of several problems with multi-choice questions, though, fortunately, it does not seem to have any bearing on the very interesting phenomenon you have discovered.