Child attains a height of 100 cm at the age of: March 2011
**Core Concept**
The question tests knowledge of pediatric growth and development, specifically the average height attainment in children. The **growth curve** is a crucial tool in assessing the developmental progress of a child.
**Why the Correct Answer is Right**
A child typically attains a height of 100 cm around the age of 4 years, as the average growth rate is about 5-6 cm per year after the first year. This is influenced by various factors including genetics, nutrition, and overall health. The **growth hormone** plays a significant role in regulating growth during childhood.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it suggests an age that is too early for a child to reach 100 cm.
**Option B:** This option might seem plausible but does not accurately reflect the typical growth pattern.
**Option D:** This option is incorrect as it suggests an age that is too late for the average child to reach 100 cm.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that growth charts are essential tools for monitoring the development of children, helping to identify any potential growth disorders early.
**Correct Answer:** B. 4 years