Based on the clue '1 of the 3 heavyweight boxing champs to fit this c...', what is the answer?

Based on the clue '1 of the 3 cs in the geological period mnemonic ca...', what is the answer? Based on the clue '1 of the 3 fireproof companions in daniel 3', what is the answer? What is associated with: 1 of the 3 former soviet satellites that joined nato in 1999? Based on the clue '1 of the 3 french cities to host the winter olympi...', what is the answer? What is associated with: 1 of the 3 in 1066? What is associated with: 1 of the 3 in 1936? What is associated with: 1 of the 3 indian cities where the british founded universities in 1857? Based on the clue '1 of the 3 losing numbers on a first roll in craps', what is the answer?