1. Suppose one transition rule of some PDA P is d(q0X) = {(p, YZ), (,XY)}. If we convert PDA P to an equivalent context-free grammar G in the manner described in Section 6.3.2 (p. 247), which of the following could be a production of G derived from this transition rule? You may assume s and t are states of P, as well as p, 9, and r. a) [qXp] O[rXs[typ] b) [qXp] 0[qYs][Zp] c) [qXp] [rXs][sYp] d) [qXp] O[PYs][Zp]