Explanation:

- The Constitution (Scheduled Tribes) Order (Amendment) Bill, 2022, was introduced in the Lok Sabha, which is the lower house of India's Parliament.

- The purpose of such bills is typically to amend the list of Scheduled Tribes for certain states or regions, which can influence the allocation of social and economic benefits.

- Option 1: Arjun Munda – This is the correct option. Arjun Munda, the Minister of Tribal Affairs, introduced the bill.

- Option 2: Ramesh Bidhuri – He is an Indian politician but not relevant here.

- Option 3: Amit Shah – He was the Minister of Home Affairs but did not introduce this bill.

- Option 4: Rajnath Singh – He served as the Minister of Defence and is not relevant to this bill.