NDA English Reconstruction of Sentences

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Question : 30 of 40
 
Marks: +1, -0
According to an engineer
might hit the market next year
P
‌
a newly developed air-cooler system
Q
‌
that employed in conventional room coolers
R
‌
which is based on a principle radically different from
S
The proper sequence should be
[NDA II 2016]
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