its (possessive) vs it's (it is)

This type of question, asked 2 times: 18 Sep 2024 S3, 24 Sep 2025 S2. All 2 questions below, oldest first.

Try each one first, then open its answer.

Question 1
18 Sep 2024 S3
88 $Select the most appropriate option to substitute the underlined segment in the given sentence. A computer can’t function without it’s mother board.$
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Question 2
24 Sep 2025 S2
90 $Find the part of the sentence that contains an error: It's central location (1)/ makes the conference venue (2)/ convenient for delegates (3)/ travelling from different cities. (4)/$
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Question 1