Which of the following sentences has an error in the use of articles?

The correct answer is Option (4) → This dictionary is an useful gift for any student.

“A” before a “yoo” sound:

The given sentence says “an useful gift”. This is wrong. “A” or “an” depends on the first sound of the next word, not its first letter. “Useful” begins with the letter u, but its first sound is “yoo”. This is a consonant sound, so it takes “a”.

Corrected: This dictionary is a useful gift for any student.

Why the Other Options are Incorrect?

Option 1: We visit our grandparents in Lucknow twice a year. This sentence is correct. “A” here means “in each” (twice in each year).

Option 2: Rice is grown in many parts of India. This sentence is correct. “Rice” cannot be counted and is used in a general sense, so it takes no article.

Option 3: Ishita is the youngest girl in her class. This sentence is correct. “The” comes before the highest form of a describing word, such as “youngest”.