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Which of the following statements are correct with reference to glass fiber reinforced composite?     

1.   They are isotropic

2.   Coefficient of expansion of fiber should match closely to that of the plastic material.

3.   The fiber and plastic material should be chemically compatible to each other

(a) 1, 2 and 3                  (b) 1 and 2 only

(c) 2 and 3 only              (d) 1 and 3 only

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