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Select the correct statements `(s)` about `NHE`.

A

`E^(c-)` of `SHE` is arbitrarily assumed to be zero.

B

`E^(c-)` of `SHE` is equal to zero.

C

`SHE` refers as `underset(1 ba r)(Pt,H_(2)(g))|underset(a=1)(H^(o+)(aq))`at `25^(@)C`.

D

`SHE` is very susceptible to dissolved `O_(2),H_(20S` and all other reducing agents.

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a,c,d
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