What is the election with an outcome of ndc opposition and 2,728,241 votes?
CREATE TABLE "table_presidential_elections" (
  "election" text,
  "candidate" text,
  "number_of_votes" text,
  "share_of_votes" text,
  "outcome_of_election" text
);
SELECT "election" FROM "table_presidential_elections" WHERE "outcome_of_election"='ndc opposition' AND "number_of_votes"='2,728,241';