A relational schema for a train reservation database is given below: Passenger (pid, pname, age)

Table: passenger

pid	pname	Age
0	Sachin	65
1	Rahul	66
2	Sourav	67
3	Anil	69

Table: Reservation

pid	class	tid
0	AC	8200
1	AC	8201
2	SC	8201
5	AC	8203
1	SC	8204
3	AC	8202

What pids are returned by the following SQL query for the above instance of the tables?

SELECT           pid
FROM  Reservation
WHERE           class 'AC' AND
                        EXISTS (SELECT *
                        FROM Passenger
                        WHERE age 65 > AND
                        Passenger. pid = Reservation. pid)