Consider the following statements regarding bones in the human body: 1. They consist of 80% solid matter and20% water. 2. Solid matter in the bones is made mainly of cartilage. 3. Impregnation of salts including carbonates and phosphates of lime imparts hardness to the bones. 4. In old age, the proportion of lime decreases and bones become brittle and break easily. Of these statements:
Options
(a)1,2 and 3 are correct
(b)2 and 4 are correct
(c)2 and 3 are correct
(d)1, 2, 3 and 4 are correct
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