Question

what doctrine emerged from the verdict of plessy v. ferguson?
\separate but equal\
\inequality in integration\
\in parti delicto\

Explanation:

The 1896 U.S. Supreme Court case Plessy v. Ferguson upheld racial segregation laws, establishing the legal principle that segregated public facilities for different racial groups were constitutional as long as the facilities were of equal quality. The other options are unrelated to this case: "inequality in integration" is not a formal doctrine from the ruling, and "in pari delicto" is a legal term about equal fault in a wrongful act, not tied to this case.

Answer:

"separate but equal"