Correct Option
The correct option is 2 and 3 only.
Explanation
Economics is broadly divided into two branches: Microeconomics and Macroeconomics. Microeconomics focuses on the decision-making of individual agents (consumers, firms) and specific markets. Macroeconomics analyzes the economy as a whole, focusing on aggregate variables and the interactions between different sectors.
Statement-wise Analysis
- Statement 1 is Incorrect.
Microeconomics studies the behavior of individual economic agents, such as consumers and producers. In microeconomic theory, these agents are assumed to act in their own self-interest (e.g., consumers maximize utility, firms maximize profit). They do not necessarily act in the interest of the country as a whole. While Adam Smith’s "Invisible Hand" suggests that self-interested actions can lead to social benefits, the primary motivation of the agent is personal gain, not national interest.
- Statement 2 is Correct.
Macroeconomics deals with aggregate economic variables such as Gross Domestic Product (GDP), the general price level (inflation), and total employment. It also examines the interlinkages between different sectors of the economy, such as households, firms, the government, and the external sector.
- Statement 3 is Correct.
In microeconomic analysis, the focus is often on a specific market or agent (Partial Equilibrium Analysis). To isolate the effect of specific variables, broader macro phenomena like the general inflation rate, national unemployment, or aggregate income are usually held constant or taken as given (ceteris paribus).
Key Takeaway
Microeconomics analyzes individual optimization based on self-interest, treating macro variables as constant. Macroeconomics analyzes the economy-wide aggregates and the interdependencies between various sectors.