Which of the following would not be considered a red flag from history/systems review?

In evaluating the options, resting systolic blood pressure (SBP) of 100 would not raise concerns as a red flag in the context of a history or systems review. Typically, resting SBP in the range of 90 to 120 mmHg is considered normal, and while lower than the typical average, a resting SBP of 100 on its own does not signal immediate distress or pathology in most patients.

In contrast, a resting heart rate of 120 is indicative of tachycardia, which can suggest cardiovascular issues or other systemic problems that need addressing. A resting SBP of 200 represents severe hypertension, which poses significant health risks and needs urgent evaluation. Lastly, a resting diastolic blood pressure (DBP) of 110 indicates diastolic hypertension, also warranting further investigation due to potential cardiovascular risks.

Therefore, the resting SBP of 100 does not qualify as a red flag, making it the correct answer in this context.