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Que. If the parse tree of a word w generated by a Chomsky normal form grammar has no path of length greater than i, then the word w is of length 
a. no greater than 2^(i+1) 
b. no greater than 2^i
c. no greater than 2^(i–1)
d. no greater than i
Answer:no greater than 2^(i–1)

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