The standard of care for obstetrics dictates that an internal version might be used to manipulate the a. Fetus from a breech to a cephalic presentation before labor begins b. Fetus from a transverse lie to a longitudinal lie before cesarean birth c. Second twin from an oblique lie.

c. Second twin from an oblique lie.

Explanation:

Internal cephalic version is a procedure by obstetricians which is used to change the position of the fetus if there is a breech, the obstetrician does this internally by inserting his/her hand through a dilated cervix and attempt to change the position of the fetus for easy delivery and this occurs during labour and not before the onset of labour.

The standard of care for obstetrics dictates that an internal version might be used to manipulate the second twin from an oblique lie.