Statement $P$: Mother's milk is very essential for a newborn infant.
Statement $Q$: The secretion of colostrum contains abundant antibodies.

Sometimes a pregnant woman is injected with . . . . . . hormone to hasten parturition.

Which of the following statements is false regarding Colostrum?

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$ :
Assertion $A$ : Breast-feeding during the initial period of infant growth is recommended by doctors for bringing up a healthy baby.
Reason $R$ : Colostrum contains several antibodies absolutely essential to develop resistance in the newborn baby.
In the light of the above statements,choose the most appropriate answer from the options given below:

Signal for uterine contractions and parturition originates when . . . . . . .

Which hormone acts on the uterus during parturition?