Question

give two examples of sexual and bisexual flower

Answer 1

Bisexual or perfect flowers have both male (androecium) and female (gynoecium) reproductive structures, including stamensand an ovary. Flowers that contain both androecium and gynoecium are called hermaphroditic. 
Examples of plants with perfect or bisexual flowers include the lily, rose, and most plants with large showy flowers, though a perfect flower does not have to have petals or sepals. A complete flower is a perfect flower with petals and sepals.Unisexual: Reproductive structure that is either functionally male or functionally female. In angiosperms this condition is also called imperfect, or incomplete.

Answer 2

Examples of sexual flowers :
Papaya flowers , Neem flowers ,etc.
Bisexual flowers
Hibiscus , Lily ,etc.