Consider the following statements.
1. The conquest of South India was completed during the reign of Ghiyasuddin Tughlaq.
2. The credit for completing the conquest of South India goes to Muhammad Jauna Khan.
3. Hoysala of Dwarasamudra was the only South Indian kingdom which could not be annexed to the Delhi sultanate by the Tughlaqs.
Which of the statements given above is/are correct?