Can we draw the following hypothesis from the context (see options)? 

Context:

BAGHDAD, Iraq (CNN) - Australian Prime Minister, John Howard, has made an unannounced visit to Iraq, according to the office of Iraqi transitional Prime Minister Ibrahim al-Jaafari.

Hypothesis: John Howard has been a Prime Minister in Australia
Choose from:
(a). Yes.
(b). It's impossible to say.
(c). No.