The correct answer is A. It is situated near Bay of Bengal.
The Bay of Bengal is a large bay in the Indian Ocean. It is located to the east of India and Bangladesh, and to the west of Myanmar and Thailand. The Bay of Bengal is a major source of rainfall for the Indian subcontinent. The monsoon winds, which blow from the southwest during the summer months, bring moisture from the Bay of Bengal to the Indian subcontinent. This moisture is responsible for the heavy rainfall that occurs in the Pat region of Jharkhand.
The other options are incorrect. Option B is incorrect because the Tropic of Cancer is a line of latitude that runs through the Indian subcontinent. It does not have any significant impact on the rainfall in the Pat region of Jharkhand. Option C is incorrect because the Pat region of Jharkhand is located on a relatively low elevation. Option D is incorrect because the Pat region of Jharkhand is not surrounded by lakes.