**Question:** As compared to cow's milk, human milk has a higher content of -

A. Protein
B. Fat
C. Lactose
D. Calcium

**Core Concept:** Human milk and cow's milk differ in their composition, with human milk being more suitable for infant nutrition.

**Why the Correct Answer is Right:** Human milk is more suited for infants because it changes its composition over time, ensuring optimal growth and development. When compared to cow's milk, human milk contains higher levels of specific nutrients.

**Why Each Wrong Option is Incorrect:**

A. Protein content is similar in human milk and cow's milk for infants. Human milk contains more globulins and immunoglobulins that provide passive immunity, but overall protein content is not significantly different.

B. Fat content in human milk is lower initially but increases as the infant grows older. Cow's milk has a higher fat content, making it unsuitable for infants.

C. Lactose content is similar in human milk and cow's milk. Both contain approximately 5% lactose, which is the primary source of energy for infants.

D. Calcium content is similar in human milk and cow's milk. Both contain approximately 100-120 mg/100 mL of calcium, essential for bone development in infants.

**Clinical Pearl:** Human milk undergoes constant adaptation to meet the infant's nutritional requirements. This adaptability makes human milk a superior nutrition source for infants compared to cow's milk.

**Correct Answer:** D. Calcium

**Why Calcium is Right:** Human milk contains a similar calcium content to cow's milk, which is crucial for infants' bone development. Calcium is an essential mineral for infants to support bone growth and mineralization.