In the following error spotting question, identify the part of the sentence that contains an error and select the correct option. If there is no error, select "No Error". Sentence: Pravin sat up on the sofa, with his legs tucked down him.

Introduction / Context:
This item is another error spotting question dealing with prepositions and idiomatic usage. The sentence describes how Pravin sits on a sofa with his legs in a particular position. The goal is to identify which underlined part is ungrammatical or unnatural in standard English usage and therefore needs correction.

Given Data / Assumptions:
- Full sentence: “Pravin sat up on the sofa, with his legs tucked down him.” - Part 1: “Pravin sat up on the” - Part 2: “sofa, with his legs” - Part 3: “tucked down him.” - Part 4: “No Error” - The phrase “tucked down him” is not standard English.

Concept / Approach:
The phrase “tucked down him” attempts to describe a posture but uses the wrong preposition. The common and idiomatic expression is “tucked under him” when referring to legs folded close to the body while sitting. Parts 1 and 2 appear structurally sound, while part 3 contains the incorrect preposition “down”. Correcting the preposition fixes the sentence.

Step-by-Step Solution:
Step 1: Examine part 1: “Pravin sat up on the”. This is grammatically acceptable as it begins a normal sentence about sitting up on a piece of furniture. Step 2: Examine part 2: “sofa, with his legs”. This continues correctly, specifying where he sat and the introduction of the detail about his legs. Step 3: Examine part 3: “tucked down him.” This construction is unidiomatic. The preposition “down” does not collocate with “tucked” in this context. Step 4: Recall the standard English phrase. We usually say “tucked under him” when legs are folded under the body while sitting. The correct sentence should read: “Pravin sat up on the sofa, with his legs tucked under him.” Step 5: Since only part 3 requires correction, it is identified as the erroneous segment.

Verification / Alternative check:
After correction, the full sentence reads: “Pravin sat up on the sofa, with his legs tucked under him.” This version sounds natural and grammatically correct. No modifications are needed in parts 1 and 2. If we tried to keep “down”, the phrase would remain awkward and would not reflect accepted usage. Therefore, “No Error” cannot be chosen, and the error cannot be said to be indeterminate.

Why Other Options Are Wrong:
Part 1: “Pravin sat up on the” introduces the subject and part of the predicate correctly. Part 2: “sofa, with his legs” is a correct continuation, specifying location and beginning a descriptive clause. Part 4 (No Error): This is incorrect because the phrase “tucked down him” clearly needs correction. Error cannot be identified: This is wrong because the faulty preposition “down” is identifiable.

Common Pitfalls:
Many learners are unsure about fixed expressions with prepositions, especially when several prepositions seem possible in casual speech. Relying on literal translation from another language can also lead to phrases like “tucked down him”, which do not exist in standard English. To avoid this, it is helpful to memorise common collocations such as “tucked under”, “sat on”, and “sat up” in real reading contexts.

Final Answer:
The error is in Part 3: tucked down him., where “down” should be replaced by “under”.