Highest boiling point among aldehydes of a homologous series

The same question, asked 2 times: 20 Apr 2025 S2*, 23 Apr 2025 S1. Every wording below, oldest first.

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Question 1
20 Apr 2025 S2
92 $Which from following compounds has highest boiling point?$
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Question 2
23 Apr 2025 S1
93 $Which among the following compounds has highest boiling point?$
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