SSC CPO SI and ASI Model Paper 2

Concept:In this mixed series, the letter's alphabet position and the number follow the same underlying pattern.Explanation:Write the alphabet positions of the given letters: $\mathrm{B}=2$, $\mathrm{H}=8$, $\mathrm{N}=14$, $\mathrm{T}=20$.These positions form an arithmetic progression with common difference $6$.So, the next letter's position will be $20+6=26$, and the $26$th letter is $\mathrm{Z}$.Now check the numbers: $4,64,196,400$ are exactly the squares of those positions.That is, $2^2=4$, $8^2=64$, $14^2=196$, and $20^2=400$.Therefore, the missing number is $26^2=676$.Combining the letter and number gives $\mathrm{Z}676$.Answer:The missing term is $\mathrm{Z}676$, which matches option A.