Final answer:
PO stands for 'per os' or 'by mouth,' indicating that the medication should be taken orally
Step-by-step explanation:
The acronym PO in medical terminology stands for "per os," which is a Latin term meaning "by mouth." It is used to indicate that a medication should be taken orally. So, in the context of a client with newly diagnosed bipolar disorder type 1 with a recent manic episode taking olanzapine 10mg, PO indicates that the medication should be taken orally, twice daily. The correct answer to the question is c) By Mouth.