The correct answer is D) Karnataka.
The Tungabhadra Dam is located in the state of Karnataka.
This is a direct factual question. The Tungabhadra Dam is built on the Tungabhadra River in Karnataka. Note that while the source passage does not explicitly name this dam, it is a standard CBSE Class 10 Geography fact. For MCQs, just circle/write the correct option — no explanation needed in the exam.