the strongest and most useful here. note that we do not need to insist on putting in 'that' after any of these verbs, as many other languages would do.
next week the government will ... ... the name of the new energy minister.
answer 1 is the most formal and deliberate action. 'reveal' (answer 3) suggests that until this happens, the name of the minister is a secret (which may very well also be true). 