In any good staircase, the maximum and minimum pitch respectively should be (A) 90° and 0° (B) 75° and 30° (C) 60° and 10° (D) 40° and 25°

In any good staircase, the maximum and minimum pitch respectively should be (A) 90° and 0° (B) 75° and 30° (C) 60° and 10° (D) 40° and 25°
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Answer :

Option D
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