Read each sentence to find out whether there is any grammatical error in it. The error, if any will be in one part of the sentence. The letter of that part is the answer. If there is no error, the answer is 'E'. (Ignore the errors of punctuation, if any).
In order to save petrol, motorists must have to be very cautious while driving along the highways.
A.
In order to save petrol,
B.
motorists must have to
C.
be very cautious
D.
while driving along the highways.
E.
No error
Correct answer is B
Motorists have to
