1 stack is more powerful than an FSM with no stack

1 stack is more powerful than a FSM with 2 stacks

both (a) and (b)

none of these

even

odd

null

none of these

3

1

2

none of these

all strings

no string

ε- alone

none of these

one to one not onto

one to one and onto

not one to one and not onto

not one to one and onto