I did not know hardly a anyone in the city b and so felt lonely c No error d ........

English ( Master) Adverbs

Read each sentence given below and find out whether there is an error in it. The error, if any will be one of the parts of the sentence which are marked as a, b,c and d. If there is no error, the answer will be (e) i.e. No error. (Ignore the errors of punctuation, if any).

I did not know hardly (a) anyone in the city (b) / and so felt lonely (c) / No error (d)