Exhibit 4B 
Refer to Exhibit 4B. Which one shows electrostatic attraction of R-groups?
Definitions:
Transgenders
People who cross over or occupy an intermediate position in the binary male-female gender construction.
Intersexuals
People born with reproductive organs, genitalia, and/or sex chromosomes that are not exclusively male or female.
Eunuchs
Castrated males, often assigned to serve in royal courts or as guardians of harems.
Castrati
Male singers who were castrated before puberty to preserve their high-pitched vocal range; prominent in 17th and 18th-century European classical music.
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