Agencies releasing price indices

Consider the following pairs (Index : Released by):

I. CPI-IW : Labour Bureau, Ministry of Labour and Employment

II. CPI-AL/RL : National Sample Survey Office, Ministry of Statistics and Programme Implementation

III. CPI-U, R, Combined : National Statistical Office, Ministry of Statistics and Programme Implementation

IV. WPI : Office of the Economic Advisor, Ministry of Commerce and Industry

How many of the pairs given above are correctly matched?