The standard grades of ordinary thinning is:
Correct answer: E. All of the above
- A. Light Thinning (A-Grade)
- B. Moderate Thinning (B-Grade)
- C. Heavy Thinning (C-Grade)
- D. Very Heavy Thinning (D-Grade)
- E. All of the above
Explanation
Ordinary thinning is commonly graded by intensity as light (A), moderate (B), heavy (C), and very heavy (D). Since all four are standard grades, all of the above is correct.
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