A particular BNF definition for a “word” is given by the following rules.
<word> :: = <letter> $$\mid$$ <letter><charpair> $$\mid$$ <letter><intpair>
<charpair> :: =<letter><letter> $$\mid$$ <charpair><letter><letter>
<intpair> :: = <integer><integer> $$\mid$$ <intpair><integer><integer>
<letter> :: = a $$\mid$$ b $$\mid$$ c $$\mid$$ .... $$\mid$$ y $$\mid$$ z
<integer> :: = 0 $$\mid$$ 1 $$\mid$$ 2 $$\mid$$ ....$$\mid$$ 9
Which of the following lexical entries can be derived from < word > ?
I. pick
II. picks
III. c44