Simple and mixed ketones

This type of question, asked 3 times: 15 May 2023 S2, 13 May 2024 S2, 19 May 2026 S2. All 3 questions below, oldest first.

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Question 1
15 May 2023 S2
69 $Which of the following is a simple ketone?$
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Question 2
13 May 2024 S2
87 $Which among the following is a simple ketone?$
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Question 3
19 May 2026 S2
43 $Identify the pair of ketone having both members as mixed ketones.$
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