3d element showing the maximum number of oxidation states (manganese)

The same question, asked 2 times: May 2021 S1, 11 May 2023 S1. Every wording below, oldest first.

Try each one first, then open its answer.

Question 1
May 2021 S1
73 $The 3d-block element that exhibits the maximum number of oxidation states is$
Tap an option to check your answer.
Question 2
11 May 2023 S1
76 $Which element from following exhibits highest number of various different possible oxidation states?$
Tap an option to check your answer.