English Grammar — Error Spotting (Tense Consistency) Identify the part that contains a grammatical error. If there is no error, choose 'No error'. Full sentence: Foolishly Madhu threw some water on the electric heater when it catches fire and she got a shock.

Introduction / Context:
This question checks tense consistency in narrative past contexts. When the main verbs are in the past, all time-linked events should also be in the past unless a habitual or timeless action is intended.

Given Data / Assumptions:

• Main clause: "Madhu threw ... and she got ..."
• Subordinate clause in C currently: "when it catches fire"
• All actions refer to a specific past incident.

Concept / Approach:

Use past simple for completed events in a past narrative. Present simple "catches" is incorrect for a specific past event; it should be "caught."

Step-by-Step Solution:

1) Identify the time frame: past narrative ("threw", "got").2) Align the temporal clause: change "catches" to "caught".3) Optional: improve safety phrasing, but grammar focus is tense match.4) Therefore, part C contains the error.

Verification / Alternative check:

Corrected: "Foolishly, Madhu threw some water on the electric heater when it caught fire, and she got a shock."

Why Other Options Are Wrong:

A: Past verb "threw" is correct; a comma after "Foolishly" is stylistic.B: Prepositional phrase is fine.D: "got a shock" correctly narrates a past result.E: Incorrect because C is wrong.

Common Pitfalls:

Mixing narrative tenses undermines clarity. Maintain consistent past forms unless stating general truths or habitual actions.

Final Answer:

when it catches fire