C
D
W
t is the 20th letter of the English alphabet.
dalet (ד)
D
D
i
The 14th letter of the modern Greek alphabet is xi. It is written uppercase Ξ, lowercase ξ , and the Greek name for the letter is ξι.
I think it's because it fits well in the alphabet song? LMAO
O is the 4th vowel in the English alphabet.
The letter that directly precedes the letter "N" in the English alphabet is the letter "M". The letter "M" is the 13th letter of the alphabet, while "N" is the 14th letter. Directly following the letter "N" is the vowel "O". The letter "O" is also a vowel, and is the 15th letter of the alphabet. It is the 4th vowel in the alphabet.
Delta, because pi is the 16th letter in the Greek alphabet. the square root of 16 is 4 and the 4th letter in the Greek alphabet.