Which one of the following pairs of Ministries and Departments is not correctly matched?

The Department of Pension and Pensioners' Welfare functions under the Ministry of Personnel, Public Grievances and Pensions, not the Ministry of Finance -- making pairing (a) incorrect. The Department of Official Language correctly functions under the Ministry of Home Affairs, the Department of Ex-Servicemen Welfare under the Ministry of Defence, and the Department of Pharmaceuticals under the Ministry of Chemicals and Fertilizers -- all correctly matched.