Which 2-halo or 3-halo alkane is optically inactive

The same question, asked 2 times: 25 Apr 2025 S2*, 18 Apr 2026 S2. Every wording below, oldest first.

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Question 1
25 Apr 2025 S2
73 $Which of the following compounds is an optically inactive compound?$
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Question 2
18 Apr 2026 S2
15 $Which from following compounds is NOT optically active?$
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