Correct Option (B)
The passage elucidates that a single inflation number, whether WPI or CPI, is an aggregate derived from diverse commodities and services. It explicitly states that price rises differ across various consumption items and that consumption baskets vary significantly among different socio-economic classes (poor, middle, rich). Consequently, a composite index, arrived at by averaging these disparate baskets, cannot precisely reflect the individual price movements of specific items or the distinct experiences of different consumer groups. Therefore, Option (B) accurately conveys the central message that the current method of calculating the inflation rate does not correctly measure the price rise of individual items or commodities.
Incorrect Options:
Option (A): The passage distinguishes between WPI and CPI based on their weighting mechanisms (production vs. consumption basket) but does not advocate for the exclusive use of WPI or the discontinuation of CPI. It merely highlights their different methodologies and the implications of aggregation.
Option (C): While services are mentioned as components contributing to the aggregate inflation number, the passage does not assert or imply that services are under-represented in the consumption basket used for inflation calculation. Its focus is on the heterogeneity of consumption patterns, not the weighting of specific categories.
Option (D): The passage critically examines the methodology and inherent limitations of representing inflation through a single number, particularly concerning its ability to reflect individual experiences. However, it does not question the overall utility or relevance of knowing the inflation rate itself. The discussion centers on the accuracy and representativeness of the measurement, not its fundamental usefulness.