In three-kingdom classification, fungi are included under
(a) Kingdom Fungi
(b) Kingdom Protista
(c) Kingdom Animalia
(d) Kingdom Plantae

Options

A. Kingdom Fungi
B. Kingdom Protista
C. Kingdom Animalia
D. Kingdom Plantae.

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks about the classification of fungi in the three-kingdom system proposed by Ernst Haeckel.

2. **Know the Three Kingdoms**: The three kingdoms in Haeckel's classification are:
- Kingdom Animalia (animals)
- Kingdom Plantae (plants)
- Kingdom Protista (includes various microorganisms)

3. **Identify the Grouping of Fungi**: In Haeckel's classification, fungi were included in the Kingdom Protista. This kingdom encompasses a variety of organisms, including protozoans, fungi, and some prokaryotic organisms like bacteria.

4. **Eliminate Incorrect Options**:
- Kingdom Fungi: This is not applicable as fungi were not classified under their own kingdom in this system.
- Kingdom Animalia: This kingdom includes animals, not fungi.
- Kingdom Plantae: This kingdom includes plants and algae, not fungi.

5. **Select the Correct Answer**: Based on the classification, fungi are included under Kingdom Protista.

**Final Answer**: (b) Kingdom Protista

---