Who was elected chair of the International Olympic Committee (IOC) Ethics Commission in 2017?

Introduction / Context:
The International Olympic Committee (IOC) oversees the Olympic movement and has an Ethics Commission to promote transparency and integrity. In 2017, a well known global leader was elected as chair of this commission. This question tests your awareness of international sports governance and the connection between global political figures and major sports organisations.

Given Data / Assumptions:

• The body in question is the IOC Ethics Commission.
• We are asked about the chair elected in 2017.
• Options include Ban Ki-moon, Peter Thomson, Antonio Guterres, Amina J. Mohammed and Thomas Bach.
• We assume knowledge of international news relating to sports governance.

Concept / Approach:
In 2017, former United Nations Secretary General Ban Ki-moon was elected chair of the IOC Ethics Commission. His appointment was widely reported as part of efforts to strengthen ethics and governance in the Olympic movement. Recognising his name and role, and distinguishing him from other senior international figures listed in the options, is essential to arriving at the correct answer.

Step-by-Step Solution:
1. Focus on the year 2017 and the IOC Ethics Commission, not the presidency of the IOC itself. 2. Recall that Ban Ki-moon, after completing his term as UN Secretary General, took on roles in various international initiatives, including the IOC Ethics Commission. 3. Note that he was elected as chair of this commission to enhance oversight and ethical standards. 4. Compare this recollection with the options provided: Ban Ki-moon, Peter Thomson, Antonio Guterres, Amina J. Mohammed and Thomas Bach. 5. Select Ban Ki-moon as the correct answer.

Verification / Alternative check:
To verify, you can review IOC news releases or international sports governance reports from 2017. They clearly state that Ban Ki-moon was elected chair of the IOC Ethics Commission. Additional confirmation appears in news articles summarising his post UN roles, which mention this position explicitly. The other names in the options either hold different roles or positions in other organisations.

Why Other Options Are Wrong:

• Peter Thomson: He has served as president of the United Nations General Assembly but not as chair of the IOC Ethics Commission.
• Antonio Guterres: He became UN Secretary General after Ban Ki-moon, but this role is separate from IOC positions.
• Amina J. Mohammed: She is a senior UN official but not associated with chairing the IOC Ethics Commission.
• Thomas Bach: He is the President of the IOC, not the chair of the Ethics Commission in 2017.

Common Pitfalls:
Because many of the names listed are high profile global leaders, candidates may confuse their roles. Some may pick Thomas Bach simply because he is strongly associated with the IOC as its president, ignoring the fact that the question is specifically about the Ethics Commission chair. Others might choose Antonio Guterres, thinking only of the UN connection and not the timing or specific position. Carefully reading the phrase “IOC Ethics Commission” and recalling Ban Ki-moon's appointment avoids these mistakes.

Final Answer:
In 2017, the chair of the International Olympic Committee's Ethics Commission was Ban Ki-moon.