The correct answer to the question about the dentition of man is B. No diastema. Let's break down why this is the correct answer and why the other options are incorrect or weaker. Explanation of the Correct Answer (B) Diastema refers to a gap or space between two teeth. In humans, it is common to have diastemas, especially between the incisors. This is particularly noticeable in the upper front teeth, where some individuals may have a noticeable gap. Therefore, the statement "man has no diastema" is incorrect because many people do indeed have diastemas. Detailed Breakdown of Other Options A. More molars than incisors - Correctness: This statement is true. In a typical adult human dentition, there are 8 incisors (4 on the top and 4 on the bottom) and 12 molars (6 on the top and 6 on the bottom, including the wisdom teeth). Therefore, there are more molars than incisors. C. The same number of teeth on upper and lower jaw - Correctness: This statement is also true. In a complete adult dentition, there are typically 16 teeth in the upper jaw and 16 teeth in the lower jaw, making a total of 32 teeth. Thus, the number of teeth is the same in both jaws. D. A total of thirty-two teeth - Correctness: This statement is true for a complete adult dentition. An adult human typically has 32 teeth, which includes 8 incisors, 4 canines, 8 premolars, and 12 molars (including the wisdom teeth). Summary of Why Other Options Are Correct

• Option A is correct because the number of molars (12) exceeds the number of incisors (8).
• Option C is correct because there are 16 teeth in both the upper and lower jaws.
• Option D is correct as the total number of teeth in a complete adult set is indeed 32.

Common Pitfalls

• Misunderstanding Diastema: Many students may not realize that diastemas are common in humans, leading to confusion about the presence of gaps in dentition.
• Counting Teeth: Students should be careful to count the teeth accurately, including wisdom teeth, when considering the total number of teeth in adults.
• Differences in Dentition: It's important to note that variations can occur due to genetics, dental health, and other factors, but the question refers to the typical adult dentition.

Revision Summary

• Humans can have diastemas, making option B incorrect.
• Adults typically have more molars (12) than incisors (8).
• The number of teeth is the same in the upper (16) and lower (16) jaws.
• A complete adult dentition consists of 32 teeth, including all types (incisors, canines, premolars, and molars).

Understanding these aspects of human dentition is crucial for grasping the basics of dental anatomy and its variations.