**Question:** 1st evidence of calcification of Maxillary Lateral incisor occurs

**Core Concept:** Calcification of teeth is a process that occurs during embryonic development, where minerals are deposited in the tooth germ to form the hard tissues of the tooth.

**Why the Correct Answer is Right:**
The correct answer is **C**. Calcification of teeth begins during the embryonic stage and continues through life. In the case of maxillary lateral incisors, the first evidence of calcification appears during the seventh week of intrauterine life, which corresponds to the end of the 8th week of gestation. This stage marks the formation of the enamel, dentin, and cementum in the tooth germ.

**Why Each Wrong Option is Incorrect:**
A. This option is incorrect because calcification of maxillary lateral incisors typically occurs during the seventh week of intrauterine life, which is later than the correct answer (C).
B. This option is also incorrect, as the calcification of maxillary lateral incisors begins during the seventh week of intrauterine life, not during the sixth week.
D. The calcification of maxillary lateral incisors usually starts during the seventh week of intrauterine life, making this option incorrect as well.

**Why the Correct Answer is Right:**

**Clinical Pearl/High-Yield Fact:**
The calcification of maxillary lateral incisors occurs early in fetal development, marking the start of the tooth formation process. Understanding these developmental stages is crucial for dental professionals and helps in providing accurate patient care and counselling regarding dental health during pregnancy.

In summary, the correct answer (C) indicates that the first evidence of calcification in maxillary lateral incisors appears during the seventh week of intrauterine life, marking the beginning of the tooth formation process. This information is essential for dental professionals and patients alike, particularly pregnant women, to ensure proper dental care and advice.