The correct answer is option B
Ron Weasely asked Fleur Delacour first to be his date for the Yule Ball. In the heat of looking for a partner to the ball, Ron was not only turned down but also ignored, because Fleur already had Roger Davies in mind.
At that time Harry was also in the heat of looking for a partner to the Ball but was too late to ask his choice person, so Harry and Ron felt disappointed and then decided to ask Hermione and Ginny, it was also too late because the girls have already been asked to the ball.
In frustration of who to go to and time running out, Harry decided to ask Paravati Patil who was available and suggested if lavender would love to go with Ron but she already have a date, so Parvati suggested that Ron goes with her sister Padma Patil.