Based on the clue '2 of the 4 20th century us presidents after whom s...', what is the answer?

Based on the clue '2 of the 3 types of pit vipers found in the us', what is the answer? Based on the clue '2 of the 3 us presidents in the 20th century named...', what is the answer? Based on the clue '2 of the 3 villains mentioned by name in the title...', what is the answer? Based on the clue '2 of the 3 westerns to win the oscar for best pict...', what is the answer? What is associated with: 2 of the 4 actors who earned 1974 oscar nominations for the godfather part ii one of them won? Based on the clue '2 of the 4 countries bordering afghanistan whose n...', what is the answer? Based on the clue '2 of the 4 countries that border romania', what is the answer? Based on the clue '2 of the 4 countries that border thailand', what is the answer?