1.

Correct order of BP is :-

Answer»

`H_(2)gtH_(2)O_(2)gtD_(2)OgtH_(2)OgtD_(2)`
`H_(2)O_(2)gtH_(2)gtD_(2)OgtH_(2)OgtD_(2)`
`H_(2)O_(2)gtD_(2)OgtH_(2)OgtD_(2)gtH_(2)`
`H_(2)O_(2)gtD_(2)OgtH_(2)gtH_(2)gtD_(2)`

Answer :C


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