Task: Instance Description Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes the instance 'shell shock'?

A. Broadly, the state of being a eunuch, i.e. a male without testes; narrowly, a hypogonadism characterized by the lack of mature male germ cells and testicular hormones.
B. A former diagnostic label previously given to transgender people who experienced significant dysphoria. The term was dropped and replaced with gender dysphoria in DSM-5. The condition was renamed to remove the stigma associated with the term disorder. The phrase "gender identity disorders" appeared some time before 1980, with one of the earliest being in 1972, although it was almost certainly coined before that, it is unknown who originated the term.
C. An outdated and offensive diagnosis which posited that not all transgender people are "truly" transgender (or transsexual). Sometimes used and shortened to "trutrans" by some transgender people who wish to elevate themselves above other trans people for any of various reasons.
D. A term coined in World War I by British psychologist Charles Samuel Myers to describe the type of post traumatic stress disorder many soldiers were afflicted with during the war (before PTSD was termed).

Answer: A term coined in World War I by British psychologist Charles Samuel Myers to describe the type of post traumatic stress disorder many soldiers were afflicted with during the war (before PTSD was termed).