All of the following are true regarding infantile spasms except:
a. Infantile spasms are mixed flexor-extensor spasms that last only a few seconds but may repeat more
than one hundred times in a row.
b. diagnosis is confirmed by hyposarrhythmia on EEG
c. developmental delay can be prevented by the use of corticotropin
d. Infantile spasms may develop into Lennox- Gestaut syndrome
