Who was the bowler when the batsmen was dwaraka ravi teja rp singh pragyan ojha?
CREATE TABLE "list_of_hat_tricks" (
  "no" real,
  "season" real,
  "bowler" text,
  "batsmen" text,
  "for" text,
  "against" text,
  "ground" text,
  "scorecard" text
);
SELECT "bowler" FROM "list_of_hat_tricks" WHERE "batsmen"='Dwaraka Ravi Teja RP Singh Pragyan Ojha';