Which of the following substances is/are achiral? 
Definitions:
Not-For-Profit Cooperative
An organization owned and operated by its members with the primary goal of meeting their needs and aspirations without seeking to make a profit.
Credit Union
A member-owned financial cooperative, democratically controlled by its members, and operated for the purpose of promoting thrift, providing credit at competitive rates, and offering other financial services to its members.
Credit Unions
Not-for-profit financial cooperatives that offer banking services, loans, and credit to members with common affiliations.
Central Bank
A national bank that provides financial and banking services for its country's government and commercial banking system, as well as implementing the government's monetary policy and issuing currency.
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