RRB ALP CBT I 16 Feb 2026 Shift 1 Paper

Concept:This is a floor arrangement puzzle. It is solved by testing possible positions of $\mathrm{A}$ and $\mathrm{T}$.Explanation:$\mathrm{A}$ lives on an even-numbered floor and $\mathrm{T}$ is immediately below $\mathrm{A}$.So, the possible floor pairs for $(\mathrm{A}, \mathrm{T})$ are $(2,1)$, $(4,3)$, or $(6,5)$.Exactly one person lives between $\mathrm{T}$ and $\mathrm{L}$, so $\mathrm{L}$ is two floors away from $\mathrm{T}$.Check $(\mathrm{A}, \mathrm{T}) = (6,5)$: then $\mathrm{L}$ must be on floor $3$.Now $\mathrm{W}$ is two floors away from $\mathrm{L}$, so $\mathrm{W}$ would be on floor $1$. But $\mathrm{W}$ must be immediately above $\mathrm{O}$, which is impossible here.Check $(\mathrm{A}, \mathrm{T}) = (4,3)$: then $\mathrm{L}$ can be on floor $1$ or floor $5$.In both cases, $\mathrm{W}$ would need floor $3$, which is already occupied by $\mathrm{T}$, or an invalid floor, so this case fails.Hence, $(\mathrm{A}, \mathrm{T}) = (2,1)$ is the correct pair.Then $\mathrm{L}$ lives on floor $3$, since one person lies between $\mathrm{T}$ and $\mathrm{L}$.Exactly one person lies between $\mathrm{W}$ and $\mathrm{L}$, and $\mathrm{W}$ is immediately above $\mathrm{O}$.So $\mathrm{W}$ is on floor $5$, and $\mathrm{O}$ is on floor $4$.Therefore, the person immediately above $\mathrm{L}$ (floor $3$) is on floor $4$.Answer:$\mathrm{O}$ lives immediately above $\mathrm{L}$.Correct option: C. O