Which of the following features are true for mustard?(a) Hypogynous flowers(b) Syncarpous gynoecium(c) Tetradynamous androecium(d) Parietal placentation(e) Zygomorphic flowers.

Mustard has hypogynous flowers, they are syncarpous, androecium is tetradynamous (having six stamens four of which are longer than the others) and parietal placentation but its flower has actinomorphic symmetry.