Which of the following compounds is an aldehyde? 
Definitions:
Internal Locus
A psychological term referring to individuals who believe they can control their own destiny and outcomes through their actions.
School Success
The achievement of educational goals and objectives through academic performance, often measured by grades, test scores, and completion of educational levels.
Stop-Smoking Treatment
Various methods and interventions designed to help individuals quit smoking, including counseling, medication, and support groups.
Internal Locus of Control
The belief that one has control over the outcomes of events in their lives, as opposed to external forces beyond their control.
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