Introduction:
Kodaikanal is a popular hill-station located in Tamil Nadu, India. It is known for its pleasant climate, picturesque landscapes, and rich flora and fauna. Let's explore the correct answer to this question, which is option 'B', Palani hills.

Explanation:
Kodaikanal is situated in the Palani hills of the Western Ghats, which is a mountain range running parallel to the western coast of India. The Palani hills are part of the Eastern Ghats, one of the major mountain ranges in India. Here's a detailed explanation of why option 'B' is the correct answer:

1. Cardamom hills:
- Cardamom hills are located in the southern Western Ghats of Kerala and Tamil Nadu.
- They are known for their extensive cardamom plantations and are not the location of Kodaikanal.

2. Palani hills:
- Palani hills are a range of hills in the Dindigul district of Tamil Nadu.
- Kodaikanal is nestled amidst the Palani hills and is one of the major tourist destinations in this region.
- Palani hills are home to several flora and fauna species, including the famous Kurinji flowers that bloom once in twelve years.

3. Nilgiri hills:
- Nilgiri hills are located in the Western Ghats of Tamil Nadu, Karnataka, and Kerala.
- They are known for their scenic beauty, tea plantations, and hill stations like Ooty and Coonoor.
- Kodaikanal is not located in the Nilgiri hills.

4. Amarkantak hills:
- Amarkantak hills are situated in the Maikal mountain range of the Satpura Range in Madhya Pradesh.
- They are known for their religious and cultural significance, being the origin of rivers like Narmada and Son.
- Kodaikanal is not located in the Amarkantak hills.

Conclusion:
To summarize, Kodaikanal, the famous hill-station, is located in the Palani hills of Tamil Nadu. It is important to have a clear understanding of the geography and location of various hill ranges in India to answer such questions accurately.

Kodaikanal is a hill town in the southern Indian state of Tamil Nadu. It’s set in an area of granite cliffs, forested valleys, lakes, waterfalls and grassy hills. At 2,000 meters above sea level, the town centers around man-made, star-shaped Kodaikanal Lake, bordered by evergreen forest. It lies in Palani Hills.