I think it's A but I'm not sure LOL =)
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The series alternates between letters from the beginning of the alphabet and letters from the end, specifically pairing 'a' with 'z', 'b' with 'y', 'c' with 'x', and 'd' with 'w'. Following this pattern, after 'd', the next letter should be 'w'. Hence, the next letter in the series is 'w'.
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c
T then V There are five letters between B and H, four between that and M, then three, then two...
The three letters that ribosome start with are R,I,B.
The series appears to be following a pattern where the letters are increasing in alphabetical order, skipping some letters. The pattern is A (skipping B) D (skipping E, F, G, H, I, J, K, L, M, N) O (skipping P) Q. Therefore, the next letter in the series should be R.
The next group of letters in the series is "on." The pattern involves skipping one letter between each pair: b (skip c) d, e (skip f) g, h (skip i) j, k (skip l) m. Following this pattern, after "k" and "m," the next letters are "o" (skip n) and "n."
The series alternates between letters from the beginning and the end of the alphabet: A (1st), Z (26th), E (5th), B (2nd), I (9th), Y (25th), O (15th). Following this pattern, the next letter should be the 3rd letter of the alphabet, which is C. Therefore, the next letter in the series is C.
The next letter is U A -> miss a letter (B) -> C C -> miss two letters (DE) -> F F -> miss three letters (GHI) -> J J -> miss four letters (KLMN) -> O and so on....