Read each sentence to find out whether there is any grammatical error or idiomatic error in It. The error, if any will be In one part of the sentence. The number of that part is the answer. If there is no error, the answer is ( e ). (Ignore errors punctuation, If any).
Much is the inflow of travellers that (a)/ It is tough to book an air ticket (b)/ to Ahmedabad and the international flights (c)/ too are almost over-booked. (d)/ No error (e).

Answer

a

Explanation

So ________ that' is correct form of correlative. Hence, so much is the inflow of travellers that _________ should be used.