What was the result of the 2014 and 2019 Lok Sabha elections?

The NDA led by the BJP secured victory in both elections.

The correct answer is Option 3 - The NDA led by the BJP secured victory in both elections.

Bhartiya Janata Party declared Narendra Modi (then the Chief Minister of Gujrat) as its Prime Ministerial candidate in September 2013. BJP under the leadership of Narendra Modi got a clear majority in 16th Lok Sabha elections held in 2014. BJP won 282 seats on its own, becoming the first party to gain single party majority after 30 years. Despite single-party majority of its own, BJP did choose to form the NDA government with its coalition partners.

Year 2014 was a proverbial watershed moment of Indian politics. Narendra Modi led NDA government rapidly took decisions in social sector, foreign policy and economic policy. The BJP again emerged victorious with 303 seats of its own in 2019 Lok Sabha election. Even when BJP is getting full majority, the recognition of coalition politics is still relevant. Thus, the party system has now changed almost dramatically from what it was till the seventies.