JEE Main 2021 Physics question

The half life period of radioactive element x is same as the mean life time of another radioactive element y. Initially they have the same number of atoms. Then :

• (A)x–will decay faster than y.
• (B)y– will decay faster than x.Correct
• (C)x and y have same decay rate initially and later on different decay rate.
• (D)x and y decay at the same rate always.