Alkane NOT formed when a mixture of an ethyl halide and an n-propyl halide undergoes Wurtz reaction

The same question, asked 3 times: 2 May 2023 S1, 22 Apr 2025 S1, 16 Apr 2026 S1. Every wording below, oldest first.

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Question 1
2 May 2023 S1
80 $Which of the following is NOT obtained when a mixture of bromoethane and 1-bromopropane is treated with sodium metal in dry ether?$
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Question 2
22 Apr 2025 S1
88 $Which of the following is NOT obtained when a mixture of chloroethane and 1-chloropropane is treated with sodium metal in dry ether?$
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Question 3
16 Apr 2026 S1
20 $Which of the following alkanes is NOT obtained when a mixture of ethyl iodide and n-propyl iodide is subjected to Wurtz reaction?$
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Question 1