Match List-I (Property) with List-II (System) and select the correct answer using the code given below the Lists:
List-I
(A) Resonance
(B) On-off control
(C) Natural frequency
(D) Feedback signal
List-II
1. Closed-loop control system
2. Free vibrations
3. Excessively large amplitude
4. Mechanical brake
Codes:
A B C D
(a) 1 2 4 3
(b) 3 4 2 1
(c) 1 4 2 3
(d) 3 2 4 1