The change in rate of inflation was least in which of the following .

Change in rate of inflation in : 

World : $$\frac{16-14.6}{14.6} \times 100 \approx 9.59\%$$

Developed Nations : $$\frac{14.2-11.8}{11.8} \times 100$$ $$\approx 20.34\%$$

Third World : $$\frac{36.2-26.6}{26.6} \times 100 \approx 36.09\%$$

USA : $$\frac{12.7-10.3}{10.3} \times 100$$ $$\approx 16.50\%$$

UK : $$\frac{23.5-21.7}{21.7} \times 100 \approx 8.29\%$$

Thus, the change in rate of inflation was least in UK

=> Ans - (B)