Step 1: Understanding the context.
The factional rivalry between the Syndicate (a faction of the Congress Party) and Indira Gandhi came to the forefront during the 1969 Presidential Election. The Congress Party was divided, with the Syndicate opposing Gandhi's policies, which led to a bitter conflict.
Step 2: Analysis of options.
- (A) Presidential Election 1969: Correct. The rivalry between the Syndicate and Indira Gandhi emerged publicly during the Presidential Election of 1969, when Gandhi's faction fought to secure the presidency.
- (B) State Election 1969: Incorrect. The major factional conflict became visible during the Presidential Election, not during the State Elections.
- (C) Parliamentary Election 1969: Incorrect. While Indira Gandhi faced opposition from the Syndicate, it was the Presidential Election of 1969 that highlighted this conflict.
- (D) None of above: Incorrect. The correct answer is (A), as the conflict was most evident in the 1969 Presidential Election.
Step 3: Conclusion.
The factional rivalry came to the open during the 1969 Presidential Election.
Final Answer:} Presidential Election 1969.