**Core Concept**
Bishop's score is a scoring system used to predict the likelihood of successful induction of labor. It evaluates the readiness of the cervix for labor by assessing various parameters. These parameters include cervical dilation, effacement, consistency, station of the fetal head, and cervical length.

**Why the Correct Answer is Right**
The position of the head is not a parameter in Bishop's score. Instead, the station of the head is evaluated, which refers to the level of engagement of the fetal head into the pelvis. The station of the head is typically measured in centimeters and is classified into five categories: -3 (above the level of the spines), -2 (at the level of the spines), -1 (below the spines), 0 (at the level of the ischial spines), +1 (above the ischial spines), +2 (2 cm above the spines), and +3 (3 cm above the spines). This distinction is crucial for accurate assessment.

**Why Each Wrong Option is Incorrect**
**Option A:** Cervical consistency is indeed a parameter in Bishop's score, evaluated on a scale of 0 to 2, where 0 indicates firm consistency and 2 indicates soft consistency.
**Option B:** Station of the head is a parameter in Bishop's score, as mentioned earlier, which is crucial for determining the likelihood of successful induction of labor.
**Option D:** Cervical length is also a parameter in Bishop's score, typically measured in centimeters.

**Clinical Pearl / High-Yield Fact**
When assessing the cervix for labor, it's essential to remember that the combination of cervical dilation, effacement, consistency, station of the fetal head, and cervical length provides a comprehensive picture of the cervix's readiness for labor.

**✓ Correct Answer: C. Position of head**