Which of the following is one of the resonance contributors of the intermediate produced in a Friedel-Crafts alkylation of benzene? 
Definitions:
Corpus Callosum
A broad band of nerve fibers joining the two hemispheres of the brain, facilitating interhemispheric communication.
Frontal Lobes
The areas of the brain located behind the forehead that are responsible for complex cognitive functions, including emotional regulation, problem solving, and planning.
Motor Cortex
The area of the brain responsible for the planning, control, and execution of voluntary movements.
Postcentral Gyrus
The region in the parietal lobe of the brain where the primary somatosensory cortex is located, responsible for processing tactile information.
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