Which of the following sentence is the 'Simple Sentence'?

The correct answer is Option B (He confessed his crime.).

Key Points:
• Concept: Identification of Simple, Compound, and Complex Sentences. A Simple Sentence consists of only one independent clause with a single subject and finite verb.
• Explanation:
• Option 2 ('He confessed his crime.'): Contains a single subject ('He') and a single finite verb ('confessed'). It is a Simple Sentence.
• Other Sentences:
• Option 1 is Compound (joined by coordinating conjunction 'so').
• Option 3 is Compound (joined by 'nor').
• Option 4 is Complex (contains noun clause introduced by 'that').
• Official Key: Option 2 is the official correct answer.
• Key Takeaway: Remember: A Simple Sentence contains only one independent main clause without subordinate conjunctions.