Which of the following sentences uses tin Article INCORRECTLY?

The correct option is: "What is a time ofyour arrival?"

Let us analyze why this sentence uses the article incorrectly:
1. In English grammar, definite articles ("the") are used for specific or unique nouns, whereas indefinite articles ("a" or "an") are used for non-specific nouns.
2. In the phrase "time of your arrival", the noun "time" is modified by the specific qualifying phrase "of your arrival". Because there is only one specific time of arrival for a person, "time" becomes a definite, specific noun in this context.
3. Therefore, the definite article "the" must be used instead of the indefinite article "a". The correct sentence should be: "What is the time of your arrival?"

Let us also review the other options to confirm their correctness:
- "They cannot be trusted even a bit": The phrase "a bit" is an idiomatic expression meaning "at all" or "a small amount," which correctly uses the indefinite article "a".
- "He is a strange person": Here, "person" is a singular countable noun introduced for the first time, and "strange" starts with a consonant sound, so the indefinite article "a" is used correctly.
- "There are no friends in the room": The definite article "the" is correctly used before "room" to refer to a specific room that both the speaker and listener are aware of.