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Monoclinic crystal has dimension              [DCE 2000]

A.                 \[a\ne b\ne c,\,\alpha =\gamma =90{}^\circ ,\,\beta \ne 90{}^\circ \]
B.                 \[a=b=c,\,\alpha =\beta =\gamma =90{}^\circ \]
C.                 \[a=b\ne c,\,\alpha =\beta =\gamma =90{}^\circ \]
D.                 \[a\ne b\ne c,\,\alpha \ne \beta \ne \gamma \ne 90{}^\circ \]
Answer» B.                 \[a=b=c,\,\alpha =\beta =\gamma =90{}^\circ \]


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