What would be the Gross reproductive rate for a region with a total feility rate of 6, with Male: Female ratio of 1?

**Core Concept**
The Gross Reproductive Rate (GRR) is a measure of the average number of daughters a woman would have in her lifetime, taking into account the sex ratio at birth. It is calculated by multiplying the Total Fertility Rate (TFR) by the proportion of females in the population.

**Why the Correct Answer is Right**
To calculate the GRR, we need to adjust the TFR by the sex ratio at birth. Given a male:female ratio of 1, the sex ratio at birth is approximately 1.05 (105 boys per 100 girls). The GRR is calculated as GRR = TFR x (proportion of females). Since the TFR is 6 and the proportion of females is 0.5 (assuming a 1:1 sex ratio), the GRR is 6 x 0.5 = 3.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option would be incorrect because it does not take into account the sex ratio at birth, which is necessary to calculate the GRR.
* **Option B:** This option would be incorrect because it assumes a different proportion of females in the population, which is not supported by the given information.
* **Option C:** This option would be incorrect because it does not provide a clear calculation of the GRR and may be a distractor.

**Clinical Pearl / High-Yield Fact**
When calculating the Gross Reproductive Rate, it's essential to consider the sex ratio at birth, as it affects the number of females in the population. A sex ratio at birth of 1.05 (105 boys per 100 girls) is a common assumption in demographic studies.

**Correct Answer: D. 3**