Identify the hydrogen spectral series for a transition or region

This type of question, asked 3 times: May 2021 S1, 16 May 2023 S2, 11 May 2024 S1. All 3 questions below, oldest first.

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Question 1
May 2021 S1
79 $Which of the following series of transitions of hydrogen spectrum falls in the visible region?$
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Question 2
16 May 2023 S2
66 $Which of the following series of emission spectral lines for hydrogen is observed in the visible region?$
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Question 3
11 May 2024 S1
80 $n_2 = \infty$
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