Antirrhinum is a genus of plants commonly known as dragon flowers or snapdragons because of the group (Saerorhinum). The genus is characterized by personate flowers with an inferior gibbous corolla. Cultivars have showy white, crimson, or yellow bilabiate flowers Corolla is blipped. The two lips may be open (Bilabiate and Ringent, e.g., Salvia) or closed (Bilabiate and Personate, e.g., Antirrhinum). The mouth is closed by a projection of the lower lip called palate.
So the correct answer is 'Antirrhinum'.
Climber plant with zygomoprhic flower and diadelphous stemen is
A flower having sepals, petals, stamens, and pistils are complete; lacking one or more of such structures, it is said to be incomplete. Stamens and pistils are not present together in all flowers. Rose, hibiscus, Oxalis, are a few examples