In this series, the third letter is repeated as the first letter of the next segment.

Correct Option: A

In this series, the third letter is repeated as the first letter of the next segment. The middle letter, A, remains static. The third letters are in alphabetical order, beginning with R.

The first letters are in alphabetical order with a letter skipped in between each segment: C, E, G, I, K.

Correct Option: C

The first letters are in alphabetical order with a letter skipped in between each segment: C, E, G, I, K. The second and third letters are repeated; they are also in order with a skipped letter: M, O, Q, S, U.

The first two letters, PQ, are static. The third letter is in alphabetical order, beginning with R.

Correct Option: C

The first two letters, PQ, are static. The third letter is in alphabetical order, beginning with R. The number series is in descending order beginning with 5.

The second and forth letters in the series, L and A, are static.

Correct Option: D

The second and forth letters in the series, L and A, are static. The first and third letters consist of an alphabetical order beginning with the letter E.

Because the letters are the same, concentrate on the number series,

Correct Option: B

Because the letters are the same, concentrate on the number series, which is a simple 2, 3, 4, 5, 6 series, and follows each letter in order.