Guess the name of an idol group by looking at the initial consonants only

2) Guess the idol group name just by looking at the initials🌈

1. ㅂㅌㅅㄴㄷ

2. ㅅㅂㅌ

3. ㅇㅎㅇㅍ

4. ㅇㅅㅌㄹ