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BIRD is related to CLSG in a certain way based on the English alphabetical order. In the same way, RAIN is related to SDJQ. To which of the given options is STAR related, following the same logic?
TWCV
TWBU
UWCV
UVCU
TWBU
Apply a progressive +1, +2, +3, +4 pattern to each letter position: (B+1=C, I+3=L, R+1=S, D+3=G) тАФ wait, check the specific shift pattern: B+1=C, I+3=L, R+1=S, D+3=G. The pattern is +1, +3, +1, +3.
Apply a progressive +1, +2, +3, +4 pattern to each letter position: (B+1=C, I+3=L, R+1=S, D+3=G) тАФ wait, check the specific shift pattern: B+1=C, I+3=L, R+1=S, D+3=G. The pattern is +1, +3, +1, +3.
Analyze the pattern
BIRD тЖТ CLSG. Mapping: B(2)+1=C(3), I(9)+3=L(12), R(18)+1=S(19), D(4)+3=G(7). The pattern is alternating +1 and +3.
Verify pattern with RAIN
RAIN тЖТ SDJQ. Mapping: R(18)+1=S(19), A(1)+3=D(4), I(9)+1=J(10), N(14)+3=Q(17). This confirms the +1, +3, +1, +3 sequence.
Apply pattern to STAR
S(19)+1=T(20), T(20)+3=W(23), A(1)+1=B(2), R(18)+3=U(21). Result: TWBU.
A: TWCV is incorrect as the last letter is U (18+3), not V. C: UWCV is incorrect as the first letter is T (19+1), not U. D: UVCU is incorrect as it fails the +1, +3, +1, +3 mapping entirely.
B is correct because applying the +1, +3, +1, +3 pattern to the letters of STAR (S+1=T, T+3=W, A+1=B, R+3=U) results in TWBU.
In coding-decoding questions, always check if the shift is constant or alternating. If the shift is inconsistent, look for vowel/consonant-based logic or position-based reversal.
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