Question: kpop group that has 4 members?
Answer: From the current active groups, K-Pop girl groups that have 4 members are Blackpink, Mamamoo and Brown Eyed Girls. These 3 groups had always 4 members. Girls' Day, Dal Shabet, f(x) and Kara were groups that started with more members, but finished (or are in hiatus) having 4 members.