Step 1: Concept
The human skeletal system changes from birth to adulthood as certain bones fuse together.
Step 2: Meaning
An adult skeleton is the fully developed framework of the body once growth plates have closed and bone fusion is complete.
Step 3: Analysis
Infants are born with approximately 270 to 300 bony elements. As a person grows, many of these bones (like those in the skull and sacrum) fuse. By adulthood, the standard count is 206 bones.
Step 4: Conclusion
The definitive number of distinct bones in a typical adult human skeleton is 206.
Final Answer: (B)