Correct option is C
When the price level increases, the nominal national income (or monetary national income) may appear to grow, but the real national income (adjusted for inflation) may grow at a much slower rate. This is because real national income measures the value of goods and services produced in an economy adjusted for changes in price level, reflecting the true purchasing power. When inflation is high, nominal income increases, but the actual quantity of goods and services may not, resulting in a lower growth rate of real national income.
