Nourishing food is a necessity both for a pregnant mother and a baby.

Answer: Option A

Nourishing : (of food) containing substances necessary for growth, health, and good condition.
Unhygienic : not clean or sanitary.
Poor : lacking sufficient money to live at a standard considered comfortable or normal in a society.
Undercooked : cook (something) insufficiently.
Heavy : of great weight; difficult to lift or move.

Antonym of Nourishing is Unhygienic