Final answer:
The primary accent in the word 'mammography' is on the second syllable, 'mam'.
Step-by-step explanation:
In the word 'mammography', the primary accent or stress is on the second syllable, 'mam'. The syllable 'mam' is emphasized by a higher pitch, longer duration, and stronger intensity compared to the other syllables. So the correct answer is a) mam.