On oxidation, silver changes its colour to _______ and copper changes its colour to _______.
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A.
grey; green
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B.
black; green
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C.
black; blue
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D.
grey; blue
Correct Answer:
B. black; green
Explanation:
The logic involves shifting each letter backward in the English alphabet by a specific decreasing interval: the first letter shifts by 4, the second by 4, the third by 4, and the fourth by 4.
Applying this pattern to QIRK: - Q - 4 = M
- I - 4 = E
- R - 4 = N (Wait, let me re-evaluate the pattern from the examples provided: SKIB to OGNG and CUCV to YQHA).Analysis:
S(19) to O(15) is -4
K(11) to G(7) is -4
I(9) to N(14) is +5
B(2) to G(7) is +5
C(3) to Y(25) is -4
U(21) to Q(17) is -4
C(3) to H(8) is +5
V(22) to A(1) is +5
Applying -4, -4, +5, +5 to QIRK:
Q(17) - 4 = M(13) -\> M
I(9) - 4 = E(5) -\> E
R(18) + 5 = W(23) -\> W
K(11) + 5 = P(16) -\> P
Following this logic, the correct option is MEWP.
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