Consider the following pairs of archaeological sites and their location/description:

Site : State : Description

1. Inamgaon : Maharashtra : Chalcolithic settlement

2. Mangadu : Kerala : Megalithic burial site

3. Chandraketugarh : Odisha : Ancient trading port

4. Salihundam : Andhra Pradesh : Rock-cut Buddhist cave shrine

How many of the above pairs are correctly matched?