Which one of the following is the correct matching of three items and their grouping category ?

1. A. Cytosine, uracil, thiamine — Pyrimidines
2. B. Malleus, incus, cochlea — Ear ossicles
3. C. ilium, ischium pubis — Coxal bones of pelvic girdle
4. D. Actin, myosin, rodopsin — Muscle proteins

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