**Core Concept**
The cervix is a complex organ composed of various tissue layers, including connective tissue and smooth muscle. The relative proportions of these tissues are essential for understanding the cervix's structure and function, particularly during pregnancy and childbirth.

**Why the Correct Answer is Right**
The cervix is primarily composed of connective tissue, which provides structural support and maintains its shape. Smooth muscle, on the other hand, is present in the cervical stroma and plays a crucial role in cervical dilation during labor. The ratio of connective tissue to smooth muscle in the cervix is approximately 30:1. This high proportion of connective tissue helps to maintain the cervix's structural integrity, while the smooth muscle allows for controlled cervical dilation during labor.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the ratio of connective tissue to smooth muscle in the cervix is not 1:1.
**Option B:** This option is incorrect because the ratio of connective tissue to smooth muscle in the cervix is not 10:1.
**Option C:** This option is incorrect because the ratio of connective tissue to smooth muscle in the cervix is not 1:30.

**Clinical Pearl / High-Yield Fact**
The cervix's high proportion of connective tissue makes it an ideal site for cervical biopsies, as the connective tissue provides a stable foundation for histopathological examination.

**Correct Answer: C. 30:1**