Given below are four sentences, out of which one sentence is grammatically incorrect. Choose the option which points out the grammatically incorrect sentence. If all the sentences are correct, then choose ‘No error’ as the answer.

Explanation

Correct answer: (d) (a) The warden warned the inmates to follow the rules strictly. Rule: Structure → Subject + Verb + Object + Infinitive (“to + verb”) “Warned someone to do something” is grammatically correct. Analysis: Proper use of “warned + object + to + verb”. Example: The teacher warned the students to stay quiet. (b) He declined to comment on the matter during the hearing. Rule: Verb pattern → “decline + to + verb” Analysis: “Declined to comment” is correct infinitive usage. Example: She declined to participate in the event. (c) The letter was signed and dispatched before sunset. Rule: Passive voice → Subject + was/were + past participle Analysis: “Was signed and dispatched” shows correct parallel passive verbs. Example: The documents were verified and approved. (d) She has been appointed to this post since last Monday. Rule: “Since” is used with Present Perfect / Present Perfect Continuous for actions that started in the past and continue till now. But “appointed” is a completed action, not continuous. Correct structure: “She was appointed to this post last Monday.” Analysis: Present perfect is wrongly used with a completed action. Example (correct): She has lived here since 2020. Example (incorrect like question): He has joined the company since 2022. (e) No error Incorrect because sentence (d) has an error. Final takeaway: Error is due to incorrect use of present perfect tense with “since” for a completed action, so (d) is wrong.