Correct option is D
The statement tells us that the servant bought only green vegetables and all the green vegetables available in the market. However, it does not mention whether other types of vegetables were present.
Option A is incorrect because other vegetables might have been available.
Option B is incorrect because the absence of other vegetables is not confirmed.
Option C is incorrect because the servant only bought green vegetables, not all vegetables.
Option D is correct because the servant explicitly mentioned he bought no vegetables other than green ones.