his sudden resignation is a mystery (state whether it is a phrase or clause.give reason) Share with your friends Share 1 Utkarsh Arora answered this I think its a phrase because a phrase is a group of words that lacks either a subject, a predicate, or both and "his sudden resignation" lacks a predicate. 3 View Full Answer Tejas Kaushik answered this yes it is 0 Tejas Kaushik answered this yes it is -1