(a) That's wrong. Australian courts have held that a duty of care can be owed, in appropriate circumstances, to an unborn child, provided that child is born alive in due course.

There is a duty to avoid foreseeable harm that may occur not only after the child is born, but also harm that may affect the unborn foetus. See Watt v Rama [1972] VR 353.

It is possible for a mother to be liable for ante-natal injuries to her unborn child, at least in some circumstances where policy considerations do not require an immunity. One such exceptional case is where the mother has driven negligently.

Lynch v Lynch (1991) 25 NSWLR 411.

The deliberate taking of recreational drugs that will cause ante-natal harm may be another exceptional case.

In the circumstances of the case study, both of the arguments made by A are most likely without substance.