'A' &'B' are types of connective tissues. The ground substance of 'A' is hard and non-pliable whereas ground substance of 'B' is solid and pliable. 'A' differs from B in such a way that former
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Solution
Answer (3)
A is bone having several concentric layers (lamellae) of bone matrix.
B is cartilage having solid and pliable ground substance which resists compression.