**Core Concept**
True labour is characterized by regular uterine contractions that lead to cervical dilation and effacement, whereas false labour involves irregular contractions without progressive cervical change. The distinction between true and false labour is crucial for obstetric management.

**Why the Correct Answer is Right**
Since the question is incomplete, let's focus on the general differences between true and false labour. True labour is marked by consistent contractions, cervical dilation, and a decrease in cervical length.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific details of option A, we can't directly address why it's incorrect, but generally, true labour is distinguished from false labour by the presence of cervical change.
**Option B:** Similarly, without specifics, we can say that false labour often lacks the consistent, intense contractions seen in true labour.
**Option C:** This option might relate to the intensity or frequency of contractions, which are typically more consistent in true labour.
**Option D:** This could potentially be related to the pain pattern or the patient's perception of contractions, which can be misleading in distinguishing between true and false labour.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that true labour contractions lead to progressive cervical dilation and effacement, which is not seen in false labour.

**Correct Answer:** D. Intensity of pain