Given data,
W1 and W2 are 2 strings,
|W1|=|W2| means same length
Example CFG grammar:
S→ Cbb | cc
C→ a
W1=cc W2=abb
As per the grammar, W1 require only one derivation S→ cc
W2 requires two derivations S→ Cbb→ abb
It means W1 is smaller than W2.
Correct option- (C) Some derivation of W1 may be shorter the derivation of W2