grammar symbols on the right hand side

terminals on the right hand side

non-terminals on the right hand side

all of these

ε can't be the right hand side of any production

terminal symbols can't be present in the left hand side of any production

number of grammar symbols in the left hand side is not greater than the number of grammar symbols in the right hand side

all of these

push-down automata

2-way linear bounded automata

both 1) push-down automata and 2) 2-way linear bounded automata

none of these

I and II

I, III and IV

I, II and III

I, II and IV

two or more productions have the same non-terminal on the left hand side

a derivation tree has more than one associated sentence

there is a sentence with more than one derivation tree corresponding to it

brackets are not present in the grammar