Regarding presynaptic inhibition which of the following combination is true- a) Affected by axo-axonic transmission. b) Not affected by pharmacologic agent c) prolonged by anaesthetic agents d) not prolonged by strychnine e) Inhibited by picrotoxin f) it will increase EPSP

• A. a,c and f are true.
• B. a,d,e are true
• C. d,c and b are true
• D. a,d and b are true