The Mauryan dynasty was replaced by the Sunga (or Shunga) dynasty after Brihadratha, the last Mauryan emperor, was assassinated by his commander Pushyamitra Sunga around 185 BCE. The Mughal dynasty came much later (16th century CE). 'Wadohar' appears to be a misspelling. Option C incorrectly lists Mauryan again, which cannot replace itself.