Which of the following is not a correct hierarchial order?

Options

A. Class, family, genus
B. Phylum, order, family
C. Class, order, family
D. Family, order, class

Explanation

To determine which of the following options is not a correct hierarchical order in biological classification, we need to understand the correct sequence of taxonomic categories as established by Carolus Linnaeus. The correct hierarchical order from highest to lowest rank is as follows:

1. **Kingdom**
2. **Phylum**
3. **Class**
4. **Order**
5. **Family**
6. **Genus**
7. **Species**

Now, let's analyze the given options to identify which one does not follow this correct order.

### Step-by-Step Solution:

1. **Identify the Hierarchical Order**:
- The correct order is: Kingdom > Phylum > Class > Order > Family > Genus > Species.

2. **Examine Each Option**:
- **Option 1**: Class, Order, Family - This is in the correct order as Class comes before Order and Family.
- **Option 2**: Family, Phylum, Order - This is incorrect because Phylum should come before Family.
- **Option 3**: Class, Order, Family - This is also in the correct order.
- **Option 4**: Family, Order, Class - This is incorrect because Family should be followed by Genus, not Order.

3. **Determine the Incorrect Option**:
- From the analysis, both Option 2 and Option 4 are incorrect. However, the question asks for one option that is not in the correct order.
- Option 4 (Family, Order, Class) is the most clearly out of order since it places Order before Class, which is incorrect.

4. **Conclusion**:
- Therefore, the answer is **Option 4: Family, Order, Class** is not a correct hierarchical order.