From among the sets of terms given below, identify those that are associated with the gynoecium.

Gynoecium is the female reproductive part of the flower which is also an essential whorl of the flower. It is made up of pistils.

Each pistil has three parts – the stigma, style and ovary.

The ovary consists of ovarian cavity (locule), which in turn has placenta in it.

Megasporangia also called ovules come out of placenta.

Embryo sac is female gametophyte. And an ovule generally has single embryo sac.

Tapetum is one of the wall layers of typical microsporangium in an anther.

Stamen is present in Androecium, the male reproductive part of the flower.

And thalamus forms the base on which all the floral whorls lay.

So the terms associated with Gynoecium are pistil, stigma, style, ovary, ovules, ovarian cavity (locule), placenta, embryo sac.

Therefore, only option (a) matches this, so correct answer is option (a).