This tests recall of a specific date from recent Indian political history, the swearing-in of the 15th Prime Minister of India.
25th May 2014: this was around the time preparations were underway, not the actual ceremony date.
19th May 2014: this was the date the BJP parliamentary party formally elected Narendra Modi as its leader, not the swearing-in date.
26th May 2014: correct. Narendra Modi took oath as Prime Minister of India on 26th May 2014 at the Rashtrapati Bhavan in New Delhi, in a ceremony attended by leaders from SAARC nations.
27th May 2014: this is a day after the actual event and does not match the recorded date.
The correct option is C, 26th May 2014, the confirmed swearing-in date of PM Narendra Modi.