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What is the average growth of healthy scalp hair per month?

  1. 1/4 inch

  2. 1/2 inch

  3. 3/4 inch

  4. 1 inch

The correct answer is: 1/2 inch

The average growth of healthy scalp hair per month varies from person to person, but the most common rate is half an inch (1/2 inch). Option A (1/4 inch) and Option C (3/4 inch) are incorrect because they are both less than or greater than the average rate. Option D (1 inch) is also incorrect because it is significantly higher than the average rate and would require exceptional hair growth. So, while the average may fluctuate, half an inch is considered a safe estimate of hair growth per month.