Okay, let's tackle this question about the General Fertility Rate. The user wants me to explain why the correct answer is right and why the others are wrong, following their specific structure. First, I need to recall what the General Fertility Rate (GFR) is. From what I remember, GFR measures the number of live births per 1,000 women of reproductive age in a given year. The key here is the denominator.

Wait, the denominator for GFR is the number of women in the reproductive age group. But what exactly is considered reproductive age? Typically, that's 15 to 49 years old. So the denominator should be the population of women in that age range. Let me confirm: GFR formula is (Number of live births in a year / Number of women aged 15-49) * 1000. Yes, that's right. So the correct answer would be the option that states the denominator is the number of women aged 15-49 years.

Now, the incorrect options. Common mistakes might include using the total population, or using a different age range like 15-44, which is sometimes used in other rates like the Total Fertility Rate. Also, some might confuse it with the number of married women, but GFR doesn't specify marital status. Another wrong option could be using the number of pregnant women, which isn't the denominator here.

For the clinical pearl, it's important to note that GFR is a key indicator of population health and planning. Students often mix up GFR with TFR, so emphasizing the age range and the specific population (women of reproductive age) is crucial. Mnemonics might help here, like remembering "General Fertility Rate uses 15-49" to distinguish from other rates.

**Core Concept**
The General Fertility Rate (GFR) measures live births per 1,000 women of reproductive age in a population. The denominator must specifically include **women aged 15–49 years**, reflecting the target demographic for fertility assessment.

**Why the Correct Answer is Right**
The GFR formula is:
**(Number of live births in a year / Number of women aged 15–49 years) × 1,000**.
This age range is chosen because it represents the typical reproductive lifespan in most populations. The denominator excludes men and non-reproductive-age women to isolate fertility trends accurately.

**Why Each Wrong Option is Incorrect**
**Option A:** "Total population" is incorrect because GFR focuses on women of reproductive age, not all individuals.
**Option B:** "Women aged 15–44 years" is a common trap but applies to the **Total Fertility Rate (TFR)**, not GFR.
**Option C:** "Married women of reproductive age" is incorrect because GFR includes all women aged 15–49, regardless of marital status.

**Clinical Pearl / High-Yield Fact**
Never confuse GFR with TFR. GFR uses **15–49 years** (live births per 1,000 women), while TFR uses **15–49 years** but measures births per woman over her lifetime. A classic exam trap is mixing age ranges and population groups.

**Correct Answer:

✓ Correct Answer: B. Women between 15 to 49 years of age