Statement-I: NDA is a one-party dominated coalition

Statement-II: NDA won 350 out of 543 seats in 2019 Lok Sabha elections.

I is correct II is incorrect

The correct answer is Option 3 - I is correct II is incorrect

Statement I: NDA is a one-party dominated coalition
This statement is correct. the Bharatiya Janata Party (BJP) dominates the NDA coalition.

Statement II: NDA won 350 out of 543 seats in 2019 Lok Sabha elections.
This statement is incorrect as NDA won 353 seats in 2019 Lok Sabha elections not 350.

In the 2019 Lok Sabha elections, The Bharatiya Janata Party (BJP) itself won 303 seats (it contested on 437 seats) out of the 543 seats.
The Bharatiya Janata Party (BJP) headed the National Democratic Alliance in the 2019 Lok Sabha elections. NDA won 353 seats in total.