In Ramayana, Mandavi was the Wife of
Option 4 is the right answer.
According to the great Hindu epic Ramayana , Mandavi was the wife of Bharat . Bharat was the younger brother of Rama . Mandvi was the daughter of Kushadhwaja, a brother of King Janaka of Mithila and a cousin of Sita.
Mandavi and Bharat had two sons Taksha and Pushkal