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Q 1280656517.     `NX` is produced by the following steps of reactions

`M+X_2 -> MX_2`

`MX_2+X_2-> M_3 X_8`

`M_3X_8+N_2CO_3-> NX+CO_2+M_3O_4`

How much `M` (Metal) is cosumed to produce `206 gm` of `NX`( Given at. wt. of `M=56, N=23, X=80)`

A

`7/4 gm`

B

`(14)/3`

C

`56`

D

`42`

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