Which of the following structures has a different configuration from the other three? 
Definitions:
Hospital Insurance
A type of insurance coverage that pays for medical and surgical expenses incurred by the insured in a hospital setting, often part of broader health insurance plans.
OASDI
The Old-Age, Survivors, and Disability Insurance program, which is the official name for Social Security in the United States, providing benefits for eligible retirees, disabled individuals, and their families.
Hospital Insurance
Coverage that pays for hospitalization expenses either partially or in full, typically part of health insurance.
Time and a Half
A pay rate that is 1.5 times the employee's regular hourly rate, typically awarded for overtime work.
Q10: Which of the following alkenes are internal
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Q30: Which of the following compounds are chiral?
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Q48: Which of the following molecules has non-polar