Correct Answer - Option 4 : Coincide with the poles
Concept:
From the Root locus we knows
1) Root locus starts from pole where gain of system (k) is zero (K = 0)
2) Root locus ends either at zero or at infinity when gain of system is infinity (k = ∞)
Conclusion:
When gain of system become zero ⇒ roots of system in the s-phase coincide with the pole.