Three students—Aryan, Bhavna, and Charan—are suspected of breaking a window. One of them always tells the truth, one always lies, and one alternates between truth and lies. They make the following statements:
• Aryan: Charan broke the window. I am a truth-teller.
• Bhavna: Aryan is lying. Charan did not break it.
• Charan: I didn't do it. Bhavna is the one who always lies.
Who actually broke the window?

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• A Aryan
• B Bhavna
• C Charan
• D Cannot be determined

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