 
			 
			MCQOPTIONS
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				| 1. | A skeletal system includes: | 
| A. | Bones | 
| B. | Cartilages | 
| C. | hexanal-1-carboxylic acid | 
| D. | Either [a] or [b] | 
| E. | None of these | 
| Answer» D. Either [a] or [b] | |