SSC CPO SI and ASI Model Paper 3

Concept:The series follows separate patterns for the first letter, the number, and the third letter.Explanation:First letters: $A, E, I, ?, Q$.They increase by $+4$: $A(1) \to E(5) \to I(9) \to M(13) \to Q(17)$.So the first letter is $M$.Third letters: $D, G, J, ?, P$.They increase by $+3$: $D(4) \to G(7) \to J(10) \to M(13) \to P(16)$.So the third letter is $M$.Numbers: $3, 4, 7, ?, 29$.Differences: $+1, +3, +7, +15$, which are $2^1-1, 2^2-1, 2^3-1, 2^4-1$.Thus the missing number is $7+7=14$, and $14+15=29$ confirms it.Hence the missing term is $M14M$.Answer:$M14M$; option D.