Anchor this date using the election timeline: results for the 16th Lok Sabha election came out on 16th May 2014, Modi was picked as the parliamentary party leader a few days later, and the oath ceremony followed once preparations for a large public event were complete.
Working through the 2014 election timeline points to option C, 26th May 2014.
In November 2023, which state government declared a fish named “Ghol” as the state fish?