Which one of the following pairs of axis lengths (a, b, c) and interaxial angles \[(\alpha ,\,\beta ,\,\gamma )\] represents the tetragonal crystal system?

\[a\ne b\ne c;\,\alpha =\beta =\gamma =90{}^\circ \]

\[a=b=c;\,\alpha =\beta =\gamma =90{}^\circ \]

\[a=b\ne c;\,\alpha =\beta =\gamma =90{}^\circ \]

\[a=b=c;\,\alpha =\beta =\gamma \ne 90{}^\circ \]

Which one of the following pairs of axis lengths (a, b, c) and interax

1.	Which one of the following pairs of axis lengths (a, b, c) and interaxial angles \[(\alpha ,\,\beta ,\,\gamma )\] represents the tetragonal crystal system?
A.	\[a=b=c;\,\alpha =\beta =\gamma =90{}^\circ \]
B.	\[a=b\ne c;\,\alpha =\beta =\gamma =90{}^\circ \]
C.	\[a\ne b\ne c;\,\alpha =\beta =\gamma =90{}^\circ \]
D.	\[a=b=c;\,\alpha =\beta =\gamma \ne 90{}^\circ \]
Answer» C. \[a\ne b\ne c;\,\alpha =\beta =\gamma =90{}^\circ \]

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Which one of the following pairs of axis lengths (a, b, c) and interaxial angles \[(\alpha ,\,\beta ,\,\gamma )\] represents the tetragonal crystal system?

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