The correct option is B 2 only
CPI for Industrial Workers (IW),CPI for Agricultural Labourer (AL),CPI for Rural Labourer (RL),CPI (Rural/Urban/Combined) are 4 types of CPI. Of these, the first three are compiled by the Labour Bureau in the Ministry of Labour and Employment. Fourth is compiled by the Central Statistical Organisation (CSO) in the Ministry of Statistics and Programme Implementation.
Consumer Price Index measures price changes from the perspective of a retail buyer.