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Option 3 : 12 : 30
The logic followed here is:
→ (42 + 4) : (43 + 4)
→ 42 + 4 = 16 + 4 = 20
→ 43 + 4 = 64 + 4 = 68
→ 20 : 68
Similarly,
→ (32 + 3) : (33 + 3)
→ 32 + 3 = 9 + 3 = 12
→ 33 + 3 = 27 + 3 = 30
→ 12 : 30
Hence, the correct answer is "12 : 30".
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