I think it's A but I'm not sure LOL =)
g.
bb
bb
c
bb
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 answer is c, as you can see, though it is irrelevant, the letters a e i o... are all vowels, between them go the letters of alphabet backwards then forwards, z , b( because a has already been used), and y which comes before z... the next letter will be c which is after b, and after that would u.
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....
c is next
This looks like two series interspered with each other. Let's put some letters in upper-case and others in lower-case BaCbDcEdF... so the next letter would be the lower-case 'e'
If that's three letters, it's "boa."