**Question:** Infant body weight is tripled by age of-

A. Birth
B. 6 months
C. 1 year
D. 2 years

**Core Concept:**
The process of weight gain during infancy is a crucial aspect of growth and development. In healthy infants, body weight follows a specific pattern that reflects the infant's nutritional status, health conditions, and overall development.

**Why the Correct Answer is Right:**
By the age of 1 year (Option C), the infant's body weight has tripled from birth weight. This milestone demonstrates the infant's successful start in achieving the recommended growth targets. A tripled body weight indicates adequate nutrition, growth, and development during the first year of life.

**Why Each Wrong Option is Incorrect:**
Option A (Birth) is incorrect because the infant is still in the process of gaining weight during the first few days after birth.

Option B (6 months) is incorrect because, by 6 months, infants have typically gained half of their birth weight but have not reached the triple mark.

Option D (2 years) is incorrect because by this age, infants are expected to have gained more than just tripled their birth weight, indicating further growth and development.

**Clinical Pearl / High-Yield Fact:**

Monitoring infant weight gain is essential for assessing overall health and development. Following recommended growth targets ensures the infant's proper growth and development. The World Health Organization (WHO) has provided growth charts that can be used to assess an infant's weight gain and compare it to the average growth patterns of other infants of the same age, sex, and gestational age.

**Correct Answer:**

**C.** 1 year

**Why the Correct Answer is Right:**
By the age of 1 year, the infant's body weight has typically tripled from birth weight, indicating a successful start in achieving the recommended growth targets. Achieving this milestone demonstrates adequate nutrition, growth, and development during the first year of life.

**Why Each Wrong Option is Incorrect:**

Option A (Birth) is incorrect because the infant is still in the process of gaining weight during the first few days after birth.

Option B (6 months) is incorrect because, by 6 months, infants have typically gained half of their birth weight but have not reached the triple mark.

Option D (2 years) is incorrect because by this age, infants are expected to have gained more than just tripled their birth weight, indicating further growth and development.