Identify the thermosetting polymer

The same question, asked 6 times: May 2021 S1, 2 May 2023 S2*, 12 May 2024 S1*, 21 Apr 2025 S1*, 19 Apr 2026 S1*, 20 Apr 2026 S2. Every wording below, oldest first.

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Question 1
May 2021 S1
94 $Which of the following is a thermosetting polymer?$
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Question 2
2 May 2023 S2
76 $Identify thermosetting polymer from following.$
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Question 3
12 May 2024 S1
83 $Identify thermosetting polymer from following.$
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Question 4
21 Apr 2025 S1
68 $Which from following is a thermosetting polymer?$
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Question 5
19 Apr 2026 S1
49 $Identify thermosetting polymer from following.$
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Question 6
20 Apr 2026 S2
49 $Which of the following is a cross-linked, thermosetting polymer?$
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Identify the thermosetting polymer

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Question 6