What is the typical range for normal pupil size in adults under normal lighting conditions?

Rationale: A. A normal adult pupil size under typical lighting conditions is about 3 to 5 mm. Pupils constrict in bright light and dilate in dim light, but this range represents the expected baseline in average lighting. This option is correct. B. A pupil size of 1 to 2 mm is considered constricted (miosis) and may be seen in conditions such as opioid use or certain neurological disorders. This is below the normal range, making this option incorrect. C. A pupil size of 5 to 7 mm is larger than normal for standard lighting and may indicate dilation (mydriasis), which can occur in low light, stress, or certain drug effects. This is not typical under normal lighting, so it is incorrect. D. A pupil size of 7 to 9 mm is significantly dilated and often associated with severe neurological conditions, drug effects, or very dark environments. This is not a normal finding in standard lighting conditions, making this option incorrect.