**Core Concept**
The normal uterus weight is an essential parameter in gynecology, particularly in the diagnosis of uterine abnormalities. The weight of the normal uterus varies with age and parity, but it is generally around 60-100 grams in non-pregnant women.

**Why the Correct Answer is Right**
The correct answer is related to the anatomical and physiological characteristics of the uterus. In a non-pregnant woman, the uterus weighs approximately 60-100 grams due to its small size and minimal muscular activity. This weight is essential in distinguishing between normal and abnormal uterine conditions, such as uterine fibroids or other pathologies.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it is too high, and a weight of 200-300 grams would be more consistent with a pregnant uterus or a uterine abnormality.
**Option B:** This option is incorrect as it is too low, and a weight of 20-50 grams would be more consistent with a severely atrophied uterus or a case of Rokitansky syndrome.
**Option C:** This option is incorrect as it is not a valid weight range for the normal uterus.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that the weight of the normal uterus is an indicator of its health and function. A significantly heavier or lighter uterus may indicate underlying pathology, such as uterine fibroids, endometriosis, or other gynecological conditions.

**Correct Answer: C. 60-100 grams.**