What was the main demand of middle classes in the revolutions of 1848?

A. Constitutionalism and national unification

Step 1: Identify the concept: this is 1848 liberal revolution. Step 2: Educated middle classes demanded constitution, press freedom and national unity. Step 3: Remember 1848 with liberal constitutional demands.

Step 1: concept पहचानें: यह 1848 liberal revolution है। Step 2: Educated middle classes constitution, press freedom और national unity की मांग कर रहे थे। Step 3: 1848 को liberal constitutional demands से याद रखें।