Answer :
Final answer:
The prescription instruction '100 mg QD' means the patient should take 100 milligrams of the prescribed medication every day. 'QD' is short for the Latin phrase 'quaque die', meaning 'every day'.
Explanation:
In medical terminology, the instruction "100 mg QD" on a prescription signifies that the patient, in this case, Nina, should ingest 100 milligrams of the prescribed medication once every day. "QD" is an abbreviation for the Latin phrase "quaque die" which means "each day" or "every day." Therefore, option A. 100 mg every day is the accurate interpretation.
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