(A) it is a condition
where the body may become violently animated or where it may be completely paralyzed--- where is an inappropriate word as it's usually used to refer to a place. Hence Wrong.
(B) it is a condition
where the body may become violently animated or it may become completely paralyzed---Same as A. Wrong.
(C) it is a condition in which the body
may become violently animated or
complete paralysis may occur---The two highlighted portions are not parallel, although it uses word which correctly. Wrong.
(D) it is a condition in
which the body may become violently animated or in
which the body may become completely paralyzed---Here in which option is repeated twice. Unnecessarily wordy as compared to Option E. Not a right option.
(E) it is a condition in which the body
may become violently animated or
become completely paralyzed--Correct. This option correctly uses word which and maintains the parallelism as mentioned in highlighted portion.