Which of the following assessment findings of a pregnant lady determine that she is in the second stage of labour?

Correct option is B

The second stage of labour begins when the cervix is fully dilated to 10 cm and ends with the delivery of the baby. This is the stage where the mother actively pushes and the fetus descends through the birth canal. Complete cervical dilation is the most definitive clinical indicator that the woman has transitioned from the first to the second stage of labour.
Explanation of options: (a) Membranes have ruptured – While membrane rupture may occur during labour, it can happen in any stage and is not specific to the second stage. (b) Cervix is dilated completely – This is the correct answer. Full dilation to 10 cm marks the transition to the second stage, initiating the pushing phase and fetal descent. (c) Begins to expel clear vaginal fluid – This may be due to ruptured membranes but does not signify the second stage specifically. (d) Contractions are regular – Regular contractions are typical throughout labour, especially in the first stage, and are not exclusive to the second stage.