Monoclinic sulphur is an example of monoclinic crystal system. What...

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1. A$a \ne b \ne c, \alpha = \beta = \gamma = 90 °$
2. B$a \ne b \ne c, \alpha \ne \beta \ne \gamma \ne 90 °$
3. C$a = b \ne c, \alpha = \beta = \gamma = 90 °$
4. D$a \ne b \ne c, \alpha = \gamma = 90 ° , \beta \ne 90 °$