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in Major Activities of Living Organisms by (48.1k points)
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The rings in trachea are- 

(A) 16 – 20 

(B) 18 – 22 

(C) 20 – 24 

(D) 22 – 26

1 Answer

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by (49.4k points)
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Best answer

The answer is (A) 16 – 20

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