The correct answer is option 1, Karolina Pliskova. In the Italian Open Women`s Tennis Singles 2019, Karolina Pliskova emerged as the winner.
To understand why the other options are incorrect, let`s look at each one:
- Option 2, Johanna Konta, is not the correct answer as she did not win the Italian Open Women`s Tennis Singles in 2019.
- Option 3, Naomi Osaka, is also incorrect as she did not participate in the Italian Open Women`s Tennis Singles in 2019.
- Option 4, Serena Williams, is incorrect as well because she did not win the Italian Open Women`s Tennis Singles in 2019.
Therefore, the correct option is 1 only, which means Karolina Pliskova won the Italian Open Women`s Tennis Singles title in 2019.