question_answer

Select options showing a sensible and meaningful serial order of the jumbled sentences.

[a] They fly low, take off vertically and land on even roofs to serve man.

[b] Therefore, for many years people tried to design a flying machine to land and rise vertically.

[c] Aeroplane need a long run-way and this is one of their disadvantages.

[d] Finally a Spaniard solved the problem by inventing the helicopter.

[e] Now helicopters are found globally, in different designs.

A)  c, b, d, a, e          

B)         b, e, c, d, a   

C)  b, d, c, e, a        

D)         c, b, d, e, a