Answer:

C clef

Explanation:

There are only 3 different musical clefs: G clef, F, clef and C clef.

G clef is placed on the second line , F clef is on the fourth line and C clef is on the first, second, third or fourth line of the musical staff.

Therefore, the answer is C clef, because it's located either on the second line or third line which has re and mi.