Find the odd one out from the given alternatives:

Correct — D.
Rule: three are measures of national output, one is an institution.

GDP (Gross Domestic Product), GNP (Gross National Product) and NNP (Net National Product) each put a value on what an economy produces over a period.

RBI, the Reserve Bank of India, is India's central bank. It is a body, not a measure → option (d).

Why the others are wrong

• (a)
  GDP — GDP is the only 'Domestic' term, which can make it look odd. It is still an output measure, the base from which GNP and NNP are worked out.
• (b)
  NNP — NNP is the only 'Net' term, but it is GNP minus depreciation, an output measure like the other two.
• (c)
  GNP — GNP is GDP plus net factor income from abroad. It shares a category with GDP and NNP: all three measure national output.

This odd-one-out is classification by general knowledge: you have to know what each abbreviation stands for.

The three output measures form a chain. GDP plus net factor income from abroad gives GNP, GNP minus depreciation gives NNP, and NNP at factor cost is national income.

Surface letters mislead here. The deciding split is measure against institution.

Key facts

• GNP = GDP + net factor income from abroad.
• NNP = GNP − depreciation.
• National income is NNP at factor cost.
• The Reserve Bank of India began operations on 1 April 1935 under the Reserve Bank of India Act, 1934.

Common traps

• Picking GDP as odd because it is the only 'Domestic' term
• Picking NNP as odd because it is the only 'Net' term

No directly related past PYQ was found.