Explanation:

- Option 1: Micro Economics

- Focuses on individual markets and consumer behavior.

- Studies specific prices, like the price of a particular product.

- Option 2: Macro Economics

- Deals with the economy as a whole.

- Examines overall issues like inflation, unemployment, and the general price level.

- Correct Answer: General Price Level is studied here.

- Option 3: Both (a) and (b)

- Micro and Macro have distinct focuses.

- General price level is a topic of macroeconomics.

- Option 4: None of these

- Incorrect because macroeconomics clearly studies the general price level.