The minister for Education (1)/ vehemently refused (2)/ the allegation that he had taken bribes. (3)/ No error. (4)

Answer

1

Explanation

The minister of Education will replace the minister for Education
vehemently (Adv.) : in a way that shows very strong feelings
allegations (Noun): a statement that someone has done something wrong/illegal of (Prep.) is used for belonging/relating to/connected with for (Prep.) is used for indicating the use of something.