With reference to the Constitution of India, which one of the following pairs is not correctly matched?

The Seventh Schedule divides subjects among three lists (Union, State, Concurrent) [1]. Stock exchanges (and futures markets) are explicitly enumerated in the Union List (Entry 48), so classifying them under the Concurrent List is incorrect; likewise Post Office Savings Bank is also a Union subject (Entry 39) and thus correctly matched in option (3) [2]. Forests and public health are matters traditionally placed in the State List and fall within State legislative competence, so options (1) and (4) align with State-level subjects. Therefore the pair incorrectly matched among the given choices is Stock Exchanges: Concurrent List (option 2) [2].

Sources

1. [1] Laxmikanth, M. Indian Polity. 7th ed., McGraw Hill. > Chapter 15: Centre State Relations > II Distribution of Legislative Subjects > p. 145
2. [2] https://www.mea.gov.in/images/pdf1/S7.pdf