Concept:The series follows a pattern of increasing gaps: each step adds one more to the previous difference.Explanation:B (2nd letter) to D (4th) is a jump of +2. D to G (7th) is a jump of +3. G to K (11th) is a jump of +4. So the next jump is +5 from K (11th). 11 + 5 = 16, which corresponds to the letter P.