**1 Answer:** b

**Explanation:** First letter in each subsequent term increases by two from the letter in previous term. This rule is obeyed for second and third letters as well.

**2 Answer:** d

**Explanation:** Even terms increase by 1. Odd terms increase as follows:

19 × 2 = 38

38 × 3 = 114

114 × 4 = 456

**3 Answer:** a

**Explanation:** First letter reduced by two in subsequent terms, so first letter of the last term will be Q. Second letter increases by 1; followed by 2, 3 and so on. So, second letter of the last term will be O.

**4 Answer:** b

**Explanation:** First letter increases by 2; followed by 3, 4 and so on. So, first letter of the last term will be J.

**5 Answer:** c

**Explanation:** First number increases by 5; followed by 7, then by 9, then by 11. So, first number of the last term will be 34 + 13 = 47. Second letter decreases by 1. So, second letter of the last term will be U. Hence, option c is the right answer.

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