Which of the following is the highest energy chair conformer of the most stable isomer of 1-ethyl-2,4-dimethylcyclohexane? 
Definitions:
Post Hoc, Ergo Propter Hoc
A logical fallacy where it is assumed that if one event follows another, the first event caused the second.
Stability
A condition in which national output is growing steadily, with low inflation and full employment of resources.
Post Hoc, Ergo Propter Hoc
A logical fallacy that suggests a causal relationship because one event followed another in time, even though no causal connection exists.
Ceteris Paribus
A Latin phrase meaning "all other things being equal," used in economics to analyze the effect of one variable on another, holding all other factors constant.
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