The pelvic girdle of birds is attached to a complex structure formed by the fusion of last thoracic, all lumbar and first caudal vertebrae which is called as:

Synsacrum

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Symphysis

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Synkaryon

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Sympelvis

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Solution

The correct option is A Synsacrum
Synsacrum: In the bird's vertebral column a complex structure is present. called Synsacrum. It is formed by the fusion of 14 to 16 vertebrae. The lumbar vertebrae will show well developed transverse process.
Symphysis: A symphysis is a fibrocartilaginous fusion between two bones. It is a type of cartilaginous joint, specifically a secondary cartilaginous joint.
Synkaryons are cells where the nuclei from two different parent cells have fused. The resulting cell has a common cytoplasm and a common nucleus.
Thus, the correct answer is option (A).

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