Directions (1-6): In the following questions, a sentence is divided into four parts. Choose the part of the sentence which may contain a grammatical error in it. If all the parts of the sentence are grammatically correct and contextually meaningful, choose option “no error” as your answer choice.

In the bookstore, (A)/ she found a intriguing (B)/ novel that immediately (C)/ captured her attention. (D)

The correct answer is B.

Let us analyze the sentence step-by-step to identify the grammatical error:
1. Part (A): "In the bookstore," - This is an introductory prepositional phrase indicating the location. It is grammatically correct and correctly followed by a comma.
2. Part (B): "she found a intriguing" - In this part, we have the indefinite article "a" preceding the word "intriguing". The word "intriguing" begins with a vowel sound (short 'i' sound). According to the rules of English grammar, the article "an" must be used before words that begin with a vowel sound (e.g., an hour, an intriguing novel), whereas "a" is used before words that begin with a consonant sound. Therefore, "a intriguing" is grammatically incorrect and should be corrected to "an intriguing".
3. Part (C): "novel that immediately" - This part contains the noun "novel" modified by the relative clause starting with "that" and the adverb "immediately". It is grammatically correct.
4. Part (D): "captured her attention." - This contains the past tense verb "captured" and its object "her attention", completing the relative clause. It is grammatically correct.

Thus, the grammatical error is in part (B).