A common inactive ingredient in products such as sunscreen lotions and shampoo is triethyl amine, also known as TEA. What of the following is the chemical structure for this compound? 
(a) (b) (c) (d)
Definitions:
Leptin
A hormone produced by fat cells that helps to regulate body weight by signaling the brain to reduce appetite and burn more calories.
Iconic Memory
A form of sensory memory that temporarily holds visual information and impressions of visual stimuli for a very short period of time after an object is observed.
Anterograde Amnesia
A condition where a person is unable to form new memories following the onset of the amnesia, though long-term memories from before the event remain intact.
Retrograde Amnesia
A loss of memory for events or information learned before an injury or the onset of a disease.
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