Solution
Option 1 -> Demonetization withdrew high-value currency notes, reducing money supply, not increasing it.
Option 2 -> Cash crunch reduced purchasing power, leading to lower consumption, not higher aggregate demand.
Option 3 -> Production and supply chains were disrupted due to cash shortage, aggregate supply did not increase.
Option 4 -> Immediate cash crunch severely limited consumer spending and business transactions, reducing aggregate demand.
Hence, Decrease in aggregate demand -> Demonetization caused an immediate withdrawal of currency from circulation, creating a severe cash crunch. This restricted people's ability to make purchases and businesses' ability to conduct transactions. Consumer spending fell sharply, and economic activity slowed down temporarily. Since aggregate demand is the total demand for goods and services in an economy (comprising consumption, investment, government spending, and net exports), the sharp fall in consumption expenditure led to a decrease in aggregate demand in the short run. -> correct