Identify the subject which does not belong to the concurrent list-

The correct answer is Option (4) → Trade and Commerce

The Seventh Schedule of the Constitution divides law-making subjects into three lists: the Union List (Parliament), the State List (state legislatures) and the Concurrent List (both). Trade and commerce within a State is a State List subject (Entry 26), while trade between states is in the Union List (Entry 42).

The other three are Concurrent List subjects:

• Education — moved from the State List to the Concurrent List by the 42nd Amendment (1976)

• Forests — also moved to the Concurrent List by the 42nd Amendment

• Trade Unions — Entry 22 of the Concurrent List, with industrial and labour disputes

The Concurrent List does mention trade and commerce in Entry 33, but only for certain goods (foodstuffs, cattle fodder, raw cotton and jute, products of industries under Union control); the subject as a whole stays with the states.