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Systems which "has"//"have" not been correctly characterised is

Answer»

cubic, a = b = c, `alpha=beta=gamma= 90^@`
cubic, a = b =c, `alpha=beta=gamma NE 90^@`
MONOCLINIC , `a ne b ne c`, `alpha=gamma=90^@` `beta ne 90^@`
tetragonal, `a = b ne c`, `alpha=beta=gamma=90^@`.

Solution :cubic, a = b =c, `alpha=beta=gamma ne 90^@`


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