Based on the clue '1 of the 3 words that rko stands for', what is the answer?

Based on the clue '1 of the 3 types of muscle it has a built in contr...', what is the answer? Based on the clue '1 of the 3 us presidents to run on a third party t...', what is the answer? Based on the clue '1 of the 3 villains to have their name in a film t...', what is the answer? Based on the clue '1 of the 3 women in the only statue that depicts w...', what is the answer? Based on the clue '1 of the 3 zesty ingredients of the original tabas...', what is the answer? Based on the clue '1 of the 4 characters ford has played more than on...', what is the answer? Based on the clue '1 of the 4 countries on the continent of africa wh...', what is the answer? Based on the clue '1 of the 5 constellations which are portrayed as a...', what is the answer?