Which one among the following Departments is not under the Ministry of Home Affairs?

The Ministry of Home Affairs comprises the Department of States, the Department of Official Language, the Department of Border Management, the Department of Home, the Department of Jammu, Kashmir and Ladakh Affairs and the Department of Internal Security. The Department of Drinking Water and Sanitation is part of the Ministry of Jal Shakti, not the Ministry of Home Affairs. Hence option (d) is the correct answer.