Which of the following is a tricarboxylic acid

The same question, asked 2 times: 2 May 2023 S2, 10 May 2024 S2. Every wording below, oldest first.

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Question 1
2 May 2023 S2
53 $Which of the following is a tricarboxylic acid?$
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Question 2
10 May 2024 S2
75 $Which of the following is tricarboxylic acid?$
Tap an option to check your answer.