In the series A, B, C, D, E, F, G, how many times does the letter 'C' appear?

A. 1

If 'A' is coded as '1', 'B' as '2', and 'C' as '3', what is the code for 'CAB'?

C. 321

Four friends, A, B, C, and D, are sitting in a row. A is not next to B. C is sitting next to D. Who is sitting in the middle?

C. C

In a group of five friends: Alice, Bob, Charlie, David, and Eva, the following conditions are given: 1) Alice cannot sit next to Bob. 2) Charlie must sit next to David. 3) Eva cannot sit at either end. Which of the following arrangements satisfies all conditions?

D. EVA, CHARLIE, DAVID, BOB, ALICE

In a code language, 'COLD' is represented as '1357' and 'WARM' as '2468'. What is the code for 'MOLD'?

D. 2465