If ZERO is encoded as ADSN, then how do you encode STOP?

Correct Option: (c) TSOP

Let's analyze the coding pattern in 'ZERO' being coded as 'ADSN'. Let's write down the alphabetical positions (1 to 26): Z(26), E(5), R(18), O(15). Coded letters: A(1), D(4), S(19), N(14). Let's check letter by letter: 1st letter: Z(26) to A(1) -> wait, Z + 1 = A (wrapping around). Let's check another pattern: reverse or position shift. Let's write words backward or check shift: Z(26) -> A(1) [+1 or -25], E(5) -> D(4) [-1], R(18) -> S(19) [+1], O(15) -> N(14) [-1]. Wait, let's check if ZERO reversed is OREZ, then shift: O(15) -> A(1)? No. Let's check standard reverse and shift: Word ZERO has letters Z, E, R, O. If we reverse the word to O, R, E, Z: O(15) -> A(1)? Let's check letter positions in reverse alphabet or alternate +1, -1. Let's re-verify STOP coded as: S(19), T(20), O(15), P(16). If the pattern from ZERO to ADSN is: Z -> A (+1 mod 26), E -> D (-1), R -> S (+1), O -> N (-1). Let's apply this exact pattern (+1, -1, +1, -1) to STOP: 1st letter S(19) + 1 = T(20). 2nd letter T(20) - 1 = S(19). 3rd letter O(15) + 1 = P(16). 4th letter P(16) - 1 = O(15). The resulting coded word is TSPO. Wait, let's check the options: (a) SPOT, (b) TSPO, (c) TSOP, (d) POST. Option (b) is TSPO. Let's double check if it's TSPO or TSOP. Wait, let's re-verify letter positions: S+1 = T, T-1 = S, O+1 = P, P-1 = O. So T, S, P, O forms the word TSPO. Option (b) is correct.