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Which of the following pair(S) is / are correctly matched?      

I.    Four bar chain: Oscillating – oscillating

II. Inertia governor: Rate of change of engine speed

III. Hammer blow: Reciprocating unbalanced mass

Select the correct answer using the codes given below:         

(a) I alone                       (b) I,II and III           

(c) II and III                   (d) I and III

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