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If sigma is Stefan's constant and b is W...

If `sigma` is Stefan's constant and b is Wien's constant, then the dimensions of length in `sigma b^4` are :

A

`[M^0L^0T^0]`

B

`[ML^-1T]`

C

`[ML^6T^-3]`

D

`[M^1L^4T^3]`

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