## **Core Concept**
Colostrum is the first milk produced by the mammary glands of female mammals (including humans) in late pregnancy and the few days after giving birth. It is rich in antibodies and has a different composition compared to mature milk, serving as an essential source of immune factors for newborns.

## **Why the Correct Answer is Right**
The correct answer highlights that colostrum has a higher concentration of **antibodies (immunoglobulins)** compared to normal milk. These antibodies are crucial for providing newborns with immediate immune protection against infections. Colostrum contains significantly higher levels of IgA, IgG, and IgM antibodies than mature milk. This characteristic is vital for the newborn's health, as it compensates for their immature immune system.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because, although colostrum does have a different composition, the specific comparison to normal milk isn't detailed enough to assess its accuracy.
- **Option B:** This option is incorrect as it does not accurately represent a key difference between colostrum and normal milk.
- **Option C:** This option is incorrect because it does not specify what aspect is being compared, making it impossible to evaluate its correctness.
- **Option D:** This option is incorrect because it does not accurately describe a recognized difference between colostrum and normal milk.

## **Clinical Pearl / High-Yield Fact**
A crucial clinical pearl is that **colostrum is rich in antibodies**, particularly **IgA**, which provides a protective coating to the newborn's gut, preventing pathogens from entering the bloodstream. This is a high-yield fact for exams and clinical practice, emphasizing the importance of breastfeeding in early infancy for immune protection.

## **Correct Answer:** . Higher concentration of antibodies.