Which is/are correct statements about oxymercuration demercuration?

Which is the wrong statement about oxymercuration - demercuration ?

Which is the wrong statement about oxymercuration - demercuration ?

Which is correct statement about proton?

Which is correct statement about proton?

Which is the wrong statement about osxy mercuration - demercuration ?

Which is correct statement about (hydride)?

Which is the correct statement about proton?

Which statement (s) is/are correct ? i. In oxymercuration and demercuration reaction, the electrophile is AcOHg^(o+) . ii. In this reaction, Hg^(+) is reduced to Hg^(0) . iii. In this reaction, Hg^(2+) is reduced to Hg^(+) iv. In this reaction, Hg^(2+) is reduced to Hg^(0) .

Which statement (s) is/are correct ? i. In oxymercuration and demercuration reaction, the electrophile is AcOHg^(o+) . ii. In this reaction, Hg^(+) is reduced to Hg^(0) . iii. In this reaction, Hg^(2+) is reduced to Hg^(+) iv. In this reaction, Hg^(2+) is reduced to Hg^(0) .