By Bentham-Hooker, how many families are placed in gymnospermae class :-

Options

A. 86
B. 88
C. 45
D. 3

Answer

To answer the question regarding how many families are placed in the Gymnospermae class according to Bentham and Hooker, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the number of families classified under Gymnospermae by Bentham and Hooker.

2. **Identify the Source**: Bentham and Hooker are known for their work in plant classification, particularly in their book "Genera Plantarum."

3. **Know the Classification**: In their classification system, Bentham and Hooker divided seed plants into two main groups: Angiosperms and Gymnosperms.

4. **Focus on Gymnosperms**: Within the Gymnosperms, Bentham and Hooker identified three specific families:
- **Netaceae**
- **Psychodaceae**
- **Coniferae**

5. **Count the Families**: From the information, we can see that there are three families listed under Gymnospermae.

6. **Select the Correct Option**: Based on the classification, the answer to the question is that Bentham and Hooker placed **three families** in the Gymnospermae class.

### Final Answer:
The number of families placed in Gymnospermae class by Bentham and Hooker is **three**.