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Which of the following pairs of engine and performance/ characteristic is/.are correctly matched?                   

1. Turbo- jet :  Efficiency increases with fligh speed

2. SI engine :   Lowest specific fuel consumption

3. Turbo- prop:            Suitable for low flight speeds

Select the correct answer using the codes given below

(a) 1 and 2                   (b)2 and 3

(c) 1 and 3                   (d)2 alone

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