The correct answer is Cervix progressively effaced and dilated.

Progressive effacement and dilatation of the cervix occurs only in true labour, so it is the exception.

False labour (Braxton Hicks) contractions are irregular, lessen with rest or a change of activity, cause discomfort mainly in the lower abdomen, and produce no progressive cervical change.

Short trick: False labour = irregular pains + unchanged cervix.