- A 26 (7C + 12T + 5L + 5S + 4Coccyx fused)
- B 22
- C 30
- D 33 (7C + 12T + 5L + 5S + 4Coccyx unfused)
Correct answer: D. 33 (7C + 12T + 5L + 5S + 4Coccyx unfused)
Explanation: The vertebral column has 33 vertebrae in childhood: 7 cervical (C1-C7), 12 thoracic (T1-T12), 5 lumbar (L1-L5), 5 sacral (fuse to form sacrum), 4 coccygeal (fuse to form coccyx). In adults, 26 bones remain after fusion of sacral and coccygeal vertebrae.
Concept context
Types of movement, muscle contraction, skeletal system, joints, and disorders. Important for Class 11 and NEET.