The bone matrix is rich in collagen fibres and:

ACopper salts

BCobalt salts

CCalcium salts

DCarbon salts

Answer & Solution

Correct answer: C. Calcium salts

1. These give the bone its strength. 2. Bones have a hard ground substance rich in calcium salts and collagen fibres. 3. So the correct answer is calcium salts. _Source: syllabus Biology, Ch 7 'Structural Organisation in Animals'_

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