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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                                             

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