In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.
He swam to(A)/ an island that(B)/ was not far away. (C)/No error(D)

The sentence "He swam to an island that was not far away." is grammatically sound.
Part A: "He swam to" is correct (verb 'swam' followed by preposition of direction 'to').

Part B: "an island that" is correct ('an' is used before a vowel sound, and 'that' acts as a relative pronoun).

Part C: "was not far away" is correctly structured in the past tense to maintain sequence with 'swam'.

Therefore, there is no error in the sentence.