The correct answer is C. 1 and 3 are true.
Gond is the largest tribal group in Chhattisgarh, with a population of over 20 lakhs. Oraon is the smallest tribal group in Chhattisgarh, with a population of less than 1 lakh. Kamar and hilly Korba are special backward tribes.
The following are the reasons why option A is incorrect:
- Option A states that 1, 2, and 3 are true. However, only 1 and 3 are true.
- Option A does not provide any evidence to support the claim that 2 is true.
The following are the reasons why option B is incorrect:
- Option B states that 1 and 2 are true. However, only 1 is true.
- Option B does not provide any evidence to support the claim that 2 is true.
The following are the reasons why option D is incorrect:
- Option D states that 2 and 3 are true. However, only 3 is true.
- Option D does not provide any evidence to support the claim that 2 is true.