Which is not a correct hierarchical order

Options

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

Answer

To determine which option is not a correct hierarchical order in biological classification, we need to understand the standard taxonomic hierarchy. The correct order of taxonomic ranks from highest to lowest is:

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

Now, let's analyze each option provided in the question:

### Step 1: Analyze the Options
1. **Option A: Class, Order, Family**
- This order is incorrect because the correct hierarchy should be Class → Family → Order, not Class → Order → Family.

2. **Option B: Family, Order, Class**
- This order is also incorrect because it reverses the correct hierarchy. The correct order should be Class → Order → Family.

3. **Option C: Phylum, Order, Family**
- This order is incorrect as well. The correct hierarchy should be Phylum → Class → Order → Family. Phylum cannot directly precede Order without Class.

4. **Option D: Class, Family, Genus**
- This order is correct as it follows the proper hierarchy: Class → Family → Genus.

### Step 2: Identify the Incorrect Hierarchical Orders
From the analysis:
- **Option A** (Class, Order, Family) is incorrect.
- **Option B** (Family, Order, Class) is incorrect.
- **Option C** (Phylum, Order, Family) is incorrect.
- **Option D** (Class, Family, Genus) is correct.

### Conclusion
The options that are not correct hierarchical orders are **Option A** and **Option B**. However, since the question asks for one option that is not correct, we can conclude that **Option B (Family, Order, Class)** is the most clearly incorrect as it completely reverses the order.

### Final Answer
**Option B: Family, Order, Class** is not a correct hierarchical order.

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