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

The correct answer is Option (4) → Last Sunday we visited Red Fort with our cousins from Lucknow.

“The” before a famous building:

The given sentence says “visited Red Fort”. This is wrong. The names of many famous buildings and monuments take “the”. We always say “the Red Fort”, just as we say “the Taj Mahal”.

Corrected: Last Sunday we visited the Red Fort with our cousins from Lucknow.

Why the Other Options are Incorrect?

Option 1: Grandpa still plays the sitar on Sunday evenings. This sentence is correct. “The” comes before a musical instrument after the verb “play”.

Option 2: It was such an exciting match that nobody left early. This sentence is correct. “Such” before a singular noun is followed by “a” or “an”. “Exciting” begins with a vowel sound, so it takes “an”.

Option 3: Our society runs a free sign-language class for the deaf. This sentence is correct. “The” before a describing word such as “deaf” means all people of that kind. “The deaf” means people who cannot hear.