Topic: Sentence (বাক্য),

Best Answer Explained in Below-:

The correct answer to the question "Is there _____ apple in the bag?" is "B) an." This choice is appropriate due to the rules of English grammar regarding articles.

In English, we use "a" before words that begin with a consonant sound, while "an" is used before words that begin with a vowel sound. The word "apple" begins with a vowel sound (/æ/), thus the correct article to precede it is "an."

Using "a" instead of "an" would sound awkward and incorrect, as in "Is there a apple in the bag?" which is phonetically jarring. The definite article "the" (option C) implies specificity, indicating a particular apple that has already been mentioned or is known to both the speaker and listener, which does not fit the context of the question as it is asking about the existence of any apple in general, not a specific one.

Option D (the asterisk) represents the absence of an article, which is also incorrect in this context since singular countable nouns like "apple" generally require an article or another determiner. Therefore, the most grammatically and contextually appropriate choice is "an."