Milk teeth–Total no. in human being:

**Core Concept**
The development and structure of **dental anatomy**, specifically focusing on **primary teeth** or **milk teeth**, is crucial in understanding the question. Primary teeth are the first set of teeth in the growth development of humans and other diphyodont mammals.

**Why the Correct Answer is Right**
The correct answer is based on the typical number of primary teeth found in a human child. Normally, children have a set of 20 primary teeth, which start coming in when they are about 6 months old and continue to erupt until they are about 3 years old. This set of teeth includes **incisors**, **canines**, and **molars** but does not include any **premolars**.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it undercounts the total number of milk teeth.
**Option C:** This option overcounts the number of primary teeth typically found in a human child.
**Option D:** Similarly, this option also overcounts the standard number of milk teeth.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the total number of primary teeth is **20**, which helps in assessing dental development and identifying any anomalies early on.

**Correct Answer:** B. 20