Which of the following numbered hydrogens is most easily abstracted by heterolytic cleavage? Explain. 
Definitions:
Public Policy Exception
A legal principle allowing courts to refuse to enforce certain contracts or clauses if they are in violation of the established public policy of the state or country.
Employment At Will
A legal doctrine that means an employer can terminate an employee at any time for any reason, except an illegal one, or no reason without incurring legal liability.
Occupational Safety
Policies, practices, and procedures implemented to protect individuals from risks and hazards in the workplace.
OSHA
The Occupational Safety and Health Administration, a federal agency tasked with ensuring safe and healthy working conditions for employees by setting and enforcing standards.
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