In humans, coccyx is formed by the fusion of which of the following number of vertebrae?
A
3
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B
4
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C
5
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D
6
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Solution
The correct option is A 4 Coccyx is a triangular tailbone, united with sacrum by intervertebral (3 to 5 fused bones) disk. Usually, it is formed by fusion of 4 vertebrae below the sacrum. It is a vestige of an embryonic tail.