Match List I (Concept) with List II (Source) and choose the correct answer from the options given below.

List I

i.Free commerce and communication

ii.Communication in economics

iii.Language as a conduit of communication

iv.Lines of communication

List II

a.Alfred Marshall

b.John Locke

c.Karl Marx

d.Adam Smith

Ai-a, ii-b, iii-c, iv-d

Bi-b, ii-a, iii-d, iv-c

Ci-c, ii-d, iii-a, iv-b

Di-d, ii-a, iii-b, iv-c ✓ Correct

Correct answer: (D) i-d, ii-a, iii-b, iv-c

Explanation

Free commerce and communication is linked to Adam Smith, whose economics tied open trade to the flow of exchange.

Communication in economics is linked to Alfred Marshall, who brought communicative exchange into economic analysis.

Language as a conduit of communication is linked to John Locke, whose conduit view saw words carrying ideas between minds.

Lines of communication is linked to Karl Marx, who used the term for the material channels binding production and society.

Tying free commerce to Marshall or the conduit view to Smith would cross these attributions.

Each concept sits with its own thinker rather than being shuffled among them.

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