The structure of D-arabinose is shown below.How many stereoisomers are possible for this molecule (including the one shown) ? 
Definitions:
Annual Wage Base
The maximum amount of income that is subject to certain taxes or benefits calculations within a calendar year.
Loss Of Income
Financial detriment resulting from an inability to work due to injury, business interruption, or other reasons, leading to a temporary or permanent lack of earnings.
Fair Labor Standards Act
The Fair Labor Standards Act (FLSA) is a U.S. law that establishes minimum wage, overtime pay eligibility, recordkeeping, and child labor standards.
Overtime Provisions
Regulations that define the conditions under which employees are entitled to extra pay for working beyond the standard working hours.
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