**Core Concept**
The estimation of fetal age is crucial in forensic medicine, particularly in cases of abortion or suspected fetal abandonment. This process involves understanding embryological development and applying formulas or guidelines to estimate gestational age based on fetal size and weight.

**Why the Correct Answer is Right**
Given the size (2 cm) and weight (10 gm) of the product of conception, forensic experts and pathologists use standard growth charts and formulas to estimate the gestational age. For a fetus of this size and weight, it would typically correspond to an early gestational age, considering that at around 5-6 weeks of gestation, the embryo is about 2 cm in length and weighs a few grams, increasing with each passing week.

**Why Each Wrong Option is Incorrect**
**Option A:** This option would be incorrect if it suggests a gestational age that is too advanced for the given size and weight.
**Option B:** Similarly, if this option suggests an age that does not align with the embryological development stage indicated by the size and weight provided.
**Option C:** This option would be incorrect if it significantly deviates from the expected gestational age based on standard fetal growth patterns.
**Option D:** If this option suggests a gestational age that is not supported by the forensic analysis of the fetus's size and weight.

**Clinical Pearl / High-Yield Fact**
In forensic pathology, estimating the age of a fetus is critical and can be done using various parameters including crown-rump length, fetal weight, and the presence of specific developmental landmarks. Remembering that around 5-6 weeks of gestation, the embryo is roughly 2 cm in length, can be a useful anchor point for estimations.

**Correct Answer:** C. 6 weeks