The correct answer is option 1, Nilgiri hills. The Western and Eastern Ghats meet at the Nilgiri hills, which is located in southern India. The Western Ghats and Eastern Ghats are two mountain ranges that run parallel to each other along the western and eastern coasts of India, respectively. The meeting point of these two ghats is significant as it marks the end of the Western Ghats and the beginning of the Eastern Ghats. The Nilgiri hills, with its lush greenery and scenic beauty, is a popular tourist destination and also home to diverse flora and fauna. It is important to note that while the Western and Eastern Ghats meet at the Nilgiri hills, there are other notable hill ranges mentioned in options 2, 3, and 4, but they are not the exact meeting point of the ghats.