Explanation
1. Find the code for 'sweet':
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Phrase 1: ′617′=sweet and hot
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Phrase 2: ′735′=coffee is sweet
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The common word is 'sweet' and the common digit is 7.
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Therefore, sweet=7.
2. Find the code for 'hot':
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Phrase 1: ′617′=sweet and hot
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Phrase 3: ′263′=tea is hot
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The common word is 'hot' and the common digit is 6.
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Therefore, hot=6.
3. Find the code for 'is':
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Phrase 2: ′735′=coffee is sweet
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Phrase 3: ′263′=tea is hot
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The common word is 'is' and the common digit is 3.
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Therefore, is=3.
4. Find the code for 'coffee':
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From Phrase 2: ’coffee is sweet’=′735′
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We know is=3 and sweet=7.
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The remaining digit is 5.
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Therefore, coffee=5.
5. Construct the code for 'coffee is hot':
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coffee=5
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is=3
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hot=6
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The digits are 5,3,6.
Conclusion:
Looking at the options, the combination 536 is present.
The correct answer is (b) 536.