Nationally Registered Certified Medical Assistant (NRCMA) (NAHP) Practice Exam

The correct abbreviation for 'every two hours' is 'Q.2H'. Options B, C, and D are incorrect because they either do not include the capital 'Q' or do not correctly indicate an hourly interval. Option B abbreviates 'every two hours' as 'BIH', but the correct abbreviation uses 'Q', which stands for 'quaque' in Latin and means 'every'. Option C abbreviates 'every two hours' as 'q.2', which does not specify an hourly interval. Option D abbreviates 'every two hours' as 'E2H', but the correct abbreviation uses 'Q' instead of 'E'. Therefore, option A is the only correct answer.