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Question:

Which region has third lowest difference between 'PPP per capita' and 'GNI per capita'?

Explanation:

Observe that GNI per capita has already been found for two regions in the options. Hence, find the PPP per capita for these two regions first:

Latin America and Caribbean:

GNI per capita = 8201.86

PPP per capita = (9838 × 1000)/644

= 15276.40

∴ Difference = 15276.40 – 8201.86

= 7074.54

East Asia and Pacific:

GNI per capita = 10171.99

PPP per capita = (42085 × 1000)/2314

= 18187.12

∴ Difference = 18187.12 – 10171.99

= 8015.13

For the remaining two regions, directly find the difference on a per capita basis.

South Asia:

$\frac{(11693-3118)}{1788}\times 1000=\frac{8575}{1788}\times 1000$

= 4795.86

Middle East and North Africa:

$\frac{\left(8890-3220\right)}{444}\times 1000=\frac{5670}{444}\times 1000$

= 12770.27

Europe and Central Asia:

$\frac{\left(29793-20738\right)}{915.5}\times 1000=\frac{9055}{915.5}\times 1000$

= 9890.77

North America:

$\frac{(21291-20561)}{363}\times 1000=\frac{730}{363}\times 1000$

= 2011.02

Sub-Saharan Africa:

$\frac{\left(3908-1543\right)}{1061}\times 1000=\frac{2365}{1061}\times 1000$

= 2229.03

Hence, the third lowest value is for South Asia.

Hence, option (b).