Explanation:

Santhals - Rajmahal Hills: This pair is correctly matched. The Santhal rebellion (also known as the Santhal Hool) occurred in the Rajmahal Hills of present-day Jharkhand and West Bengal in 1855-56.

Mundas - Chotanagpur: This pair is correctly matched. The Munda tribal community is primarily found in the Chotanagpur plateau region, and they led the Munda Rebellion (also known as the Ulgulan, or 'The Great Tumult') under the leadership of Birsa Munda during the late 19th and early 20th centuries.

Rampa - Visakhapatnam: This pair is correctly matched. The Rampa Rebellion of 1879 was a tribal uprising in the Visakhapatnam region under the leadership of tribal leaders against the British colonial government and the oppressive practices of local landlords.

Kukis - Nagaland: This pair is not correctly matched. The Kuki rebellion occurred primarily in Manipur, not Nagaland

Therefore, three out of the four pairs are correctly matched. So, the correct answer would be:

Only three pairs