Which of the following teeth are lophodont

Options

A. incisor and canine
B. canine and premolar
C. premolar and molar
D. premolar and incisor.

Explanation

To determine which teeth are lophodont, we need to understand the characteristics of lophodont teeth and the types of teeth involved. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Understanding Lophodont Teeth**:
- Lophodont teeth are characterized by elongated ridges (called "lophs") that run between the cusps of the teeth. These ridges help in grinding food, which is particularly important for herbivores that consume tough plant material.

2. **Identifying Types of Teeth**:
- The types of teeth mentioned in the options are:
- Incisors
- Canines
- Premolars
- Molars

3. **Analyzing Each Type of Tooth**:
- **Incisors**: These teeth are primarily used for cutting and do not have the elongated ridges characteristic of lophodont teeth.
- **Canines**: These are pointed teeth used for tearing food and also lack the lophodont structure.
- **Premolars**: These teeth are designed for grinding and can have lophodont characteristics, as they may have ridges that assist in this function.
- **Molars**: Similar to premolars, molars are also designed for grinding and often exhibit lophodont features.

4. **Conclusion**:
- Based on the analysis, the teeth that are classified as lophodont are the **premolars and molars**. They possess the elongated ridges necessary for effective grinding of food.

5. **Final Answer**:
- The correct option is **premolar and molar**.