Read the following passage and solve the questions based on it.
Five students—Pankaj, Jatin, Robin, Dinkar and Rahul went for the Group Discussion (GD) and the Personal Interview (PI). The panel judged these five students and gave them rankings for the GD and the PI in a descending order. Rahul, who was ranked first in the GD, was last in the PI. Robin had the same ranking in both and was just above Rahul in the PI. In the GD, Pankaj was just above Dinkar but in the PI he was in the middle, after Jatin.
Who ranked first in the PI?