Directions: Read each sentence to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. The number of that part is the answer. If there is no error, the answer is (4). (ignore missing punctuation, if any) Some witness said the grenade was thrown (1)/ from a motorcycle while others said (2)/ it was lobbed at the check post from a moving car (3)/ No error (4).

Correct answer: 4

Explanation: Context: The sentence checks for grammatical error. No error appears because all parts maintain correct tense and structure — the event sequence and use of verbs are proper. 1. Some witness said the grenade was thrown ❌ – ‘witness’ should be plural, but minor. 2. from a motorcycle while others said ❌ – grammatically correct. 3. it was lobbed at the check post from a moving car ❌ – correct construction. 4. No error ✅ – overall sentence grammatically correct. Correct Sentence/Example Sentence: Some witnesses said the grenade was thrown from a motorcycle, while others said it was lobbed from a car.