Jake's family members are quite unhappy with his behavior. There have been instances when he behaves violently and talks in a different voice, saying that his name is Rocky. However, the next moment he behaves normally, as though nothing had happened. When his family members tell him how he behaved, he denies any awareness of his bad behavior. It is most likely that Jake is experiencing:
a. posttraumatic stress disorder.
b. dissociative identity disorder.
c. obsessive-compulsive disorder.
d. generalized anxiety disorder.

B) dissociative identity disorder.

Explanation: dissociative identity disorder is an identity disturbance where individuals takes up or exhibit two or more different personality state (different behaviors). Health specialist linked this disorder to a response towards trauma as affected individuals tries to leave behind or escape bad memories.

Jake takes up or exhibit different personalities i.e different behaviors, and speaks with different voices, claiming to be someone different and in the next moment everything returnd to normalcy. This scenario shows that Jack is most likely suffering from a dissociative identity disorder.

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.