Actually that is not accurate. 12:00 P.M is the start of the afternoon. The end of morning is 11:59.99 A.M. What the question really should say is what does G have in common with 12 Noon. Noon is not P.M or A.M. A.M means Ante Meridian which in English is before midday and P.M is Post Meridian meaning after midday. So I retract the beginning of the statement thats its not accurate. But to what the question is referring to G and 12:00 P.M have nothing in common cause 12:00 P.M doesn't exist.