1.

Arrange the following fuels in the increasing order of their calorific value. (i) Petrol (ii) Wood (ii) Coal (iv) Natural gas

A.  (i), (ii), (iii), (iv)
B.            (ii), (iii), (iv) and (i)
C.            (ii), (i), (iii) and (iv)
D.          (ii), (iii), (i) and (iv)             
Answer» E.


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