Option “C” is correct. There are two alphabetical series here. The first series is with the first letters only: STUVW. The second series involves the remaining letters: CD, EF, GH, IJ, KL.

2. B_{2}CD, _____, BCD_{4}, B_{5}CD, BC_{6}D

B_{2}C_{2}D

BC_{3}D

B_{2}C_{3}D

BCD_{7}

Option “B” is correct. 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.

3. FAG, GAF, HAI, IAH, ____

JAK

HAL

HAK

JAI

Option “A” is correct. The middle letters are static, so concentrate on the first and third letters. The series involves an alphabetical order with a reversal of the letters. The first letters are in alphabetical order: F, G, H, I , J. The second and fourth segments are reversals of the first and third segments. The missing segment begins with a new letter.

4. ELFA, GLHA, ILJA, _____, MLNA

OLPA

KLMA

LLMA

KLLA

Option “D” is correct. 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.

5. CMM, EOO, GQQ, _____, KUU

GRR

GSS

ISS

ITT

Option “C” is correct. 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.

6. ZA_{5}, Y_{4}B, XC_{6}, W_{3}D, _____

E_{7}V

V_{2}E

VE_{5}

VE_{7}

Option “D” is correct. There are three series to look for here. The first letters are alphabetical in reverse: Z, Y, X, W, V. The second letters are in alphabetical order, beginning with A. The number series is as follows: 5, 4, 6, 3, 7.

7.QPO, NML, KJI, _____, EDC

HGF

CAB

JKL

GHI

Option “A” is correct. This series consists of letters in a reverse alphabetical order.

8. JAK, KBL, LCM, MDN, _____

OEP

NEO

MEN

PFQ

Option “B” is correct. This is an alternating series in alphabetical order. The middle letters follow the order ABCDE. The first and third letters are alphabetical beginning with J. The third letter is repeated as a first letter in each subsequent three-letter segment.

9. BCB, DED, FGF, HIH, ___

JKJ

HJH

IJI

JHJ

Option “A” is correct. This series consists of a simple alphabetical order with the first two letters of all segments: B, C, D, E, F, G, H, I, J, K. The third letter of each segment is a repetition of the first letter.

10. P_{5}QR, P_{4}QS, P_{3}QT, _____, P_{1}QV

PQW

PQV_{2}

P_{2}QU

PQ_{3}U

Option “C” is correct. 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.