_ ink in my pen is red.

Correct Answer: (B) The Article usage is one of the most commonly tested grammar points in NTRCA English sections. Analysis: "The ink in my pen is red." Why "The" is correct: — "The" (definite article) is used when the noun refers to something specific and already identified — "The ink in my pen" — this is a specific ink, not just any ink. It is defined/restricted by "in my pen" — When a noun is followed by a qualifying phrase or clause that specifies it, use "the" Rules for using "The": — Specific/already mentioned: "I saw a dog. The dog was black." — Only one of its kind: "The sun, the moon, the sky" — Qualified by a phrase: "The book on the table" / "The ink in my pen" Why others are wrong: ✗ "A ink" — 'A' used before consonant sounds; ink starts with vowel, needs 'An', and anyway not specific ✗ "An ink" — 'An' would be for non-specific, but ink is countable/uncountable ambiguity; still wrong here ✗ No article — Ungrammatical; ink is specified here, needs "the" Source: English Grammar in Use — Raymond Murphy; NTRCA Question Bank.