`a NE b ne c , alpha ne beta ne gamma 90^(@)` `a=b ne c , alpha = beta= gamma = 90^(@)` `a=b=c,alpha = beta=gamma =90^(@)` `a ne b ne c , alpha = gamma = 90^(@) , beta ne 90^(@)`
SOLUTION :For monoclinic crystals axial RATIOS are not EQUAL i.e., `a ne b ne c` and axial angle `alpha = gamma = 90^(@) ne beta`.