Alphabet Test — “Find the letter which is 16th from the right in the English alphabet.” (Use R + L = 27 to convert right index to left index.)

Introduction / Context:
Converting a right-side index to a letter is easiest using the standard identity for a 26-letter alphabet: R + L = 27. With R known, compute L and then read off the letter at position L from the left.

Given Data / Assumptions:

• R (from the right) = 16.
• Alphabet length = 26; hence, R + L = 27.

Concept / Approach:
Compute left index L from R: L = 27 - R. Then map L to the letter counting from A=1.

Step-by-Step Solution:

Verification / Alternative check:
Direct right counting: Z(1), Y(2), X(3), W(4), V(5), U(6), T(7), S(8), R(9), Q(10), P(11), O(12), N(13), M(14), L(15), K(16). Matches K.

Why Other Options Are Wrong:
They correspond to different right indices (e.g., L is 15th from right, J is 17th from right).

Common Pitfalls:
Off-by-one mistakes; always compute via L = 27 - R to confirm.

Final Answer:
K