Consider the following statements regarding the Dongria Kondh Community:

1. They are classified as a Particularly Vulnerable Tribal Group (PVTG) inhabiting the Niyamgiri hills of Odisha.

2. Their traditional livelihood is based on horticulture, Non-Timber Forest Products (NTFPs) collection, and podu cultivation.

3. They recognize a centralized political or religious leadership headed by Niyam Raja.

4. They speak Kui and Kuvi languages, which are distinct from Odisha's official language.

How many of the above statements are correct?