Identify the biodegradable polymer

The same question, asked 3 times: 9 May 2023 S1*, 10 May 2024 S1*, 13 May 2026 S2. Every wording below, oldest first.

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Question 1
9 May 2023 S1
63 $Identify biodegradable polymer from following.$
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Question 2
10 May 2024 S1
58 $Identify biodegradable polymer from following.$
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Question 3
13 May 2026 S2
49 $Which of the following is a biodegradable polymer?$
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