The sentence is divided into four segments: (A), (B), (C), and (D). Identify the segment that contains a grammatical error. If the sentence is both grammatically and contextually correct, select “No error” as the correct answer.

The horse was (A)/ in not mood (B)/ to continue the race (C)/ after the long journey. (D)

Correct option is B

The correct answer is B

Explanation:
The error is located in segment (B) due to a word order mismatch and an incorrect negative modifier. The phrase 'in not mood' is ungrammatical.

Grammatical Rule:
To negate a noun like 'mood' in an idiomatic descriptive phrase, we use the determiner 'no' instead of the adverb 'not'. Alternatively, one can say 'not in a mood' or 'in no mood'. The idiom 'in no mood to do something' means to have absolutely no desire to do it.

Sentence Structure:
Subject + was + in no mood + to-infinitive$

Example:
• Incorrect: The manager was in not mood to tolerate excuses.
• Correct: The manager was in no mood to tolerate excuses.

Explanation of each part:

• Part A: 'The horse was' is the singular subject paired with its correct singular past tense verb. It is correct.

• Part B: 'in not mood' is incorrect. It should be changed to 'in no mood' to fit standard English idiom requirements.

• Part C: 'to continue the race' correctly states the infinitive purpose phrase along with its object.

• Part D: 'after the long journey.' forms a correct prepositional time/reason modifier phrase.

Conclusion:
Replacing 'in not mood' with the idiom 'in no mood' eliminates the grammatical error.

So the correct answer is (b)