Step 1: Context of the story.
This question refers to the story “A Piece of String” (sometimes also related to Japanese short stories like “The Picture of Seibei” by Shiga Naoya). In the latter, Seibei is a small boy obsessed with carving gourds instead of studying.
Step 2: Event in the story.
Seibei often neglects his studies and spends time making artistic gourds. One day, he is caught red-handed by his ethics teacher while carving a gourd during school hours. The teacher scolds him for his carelessness and lack of discipline.
Step 3: Analyzing the options.
- (a) Hindi: No such subject or teacher is mentioned.
- (b) Mathematics: Incorrect — the story specifies an ethics teacher.
- (c) Ethics: Correct — Seibei was caught by his ethics teacher.
- (d) Science: Not mentioned in the story.
Step 4: Conclusion.
Therefore, Seibei was caught red-handed by his ethics teacher.