Product when an ether is dissolved in cold concentrated sulphuric acid

The same question, asked 3 times: 4 May 2023 S1, 15 May 2023 S1, 25 Apr 2025 S1. Every wording below, oldest first.

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Question 1
4 May 2023 S1
71 $Identify the product obtained when ethers are dissolved in cold concentrated sulphuric acid.$
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Question 2
15 May 2023 S1
86 $Ethers when dissolved in cold concentrated sulfuric acid forms,$
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Question 3
25 Apr 2025 S1
61 $Which of the following compounds is formed when ether is dissolved in cold concentrated sulphuric acid?$
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Question 1