The correct answer is: a) Palani Hills
The Palani Hills are a mountain range in the Western Ghats of India. They are located in the state of Tamil Nadu, and run parallel to the Western Ghats. The Palani Hills are a popular tourist destination, and are home to a number of temples and shrines.
The Palani Hills are a significant range because they form the meeting point of the Eastern Ghats and the Western Ghats. The Eastern Ghats are a mountain range that runs along the eastern coast of India, while the Western Ghats are a mountain range that runs along the western coast of India. The meeting point of these two mountain ranges is a significant geological feature, and is home to a number of unique plant and animal species.
The other options are incorrect because they are not mountain ranges that meet the Western Ghats in Tamil Nadu. The Javadi Hills are a mountain range that is located in the state of Andhra Pradesh, while the Kolli Hills and Cardamom Hills are mountain ranges that are located in the state of Tamil Nadu.