All are true except:
|A||Shwartzman reaction is type IV immune reaction|
|B||Anamnestic reaction is a transient response|
|C||Syphilis shows property of premunition|
|D||Transversion is a type of mutation in which purine is substituted in place of pyrirmidine and vice versa|
a. Shwartzman reaction is not a hypersensitivity reaction.
Anamnestic response is a transient response seen in Widal test. Increase titer is seen in patients contracting unrelated illness. It is transient.
b. A person having active syphilis is immune to reinfection, this is called as infection immunity or premonition immunity.