A) h+ ions are reduced b) fe^2+ ions are reduced c) h+ is the oxidizing agent d) mno4- is the reducing agent

b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.

it's c (engineer's do their work with mechanical stuff not on any living being)