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

6-1) Correct answer🌈

1. ㄹㄷㅂㅂ
Correct answer: Red Velvet

2. ㅁㅁㅁ
Correct answer: Mamamoo

3. ㄱㄱㄷ
Correct answer: multiplication table

4. ㅍㄹㅁㅅㄴㅇ
Correct answer: Fromis_9