Correct Answer & Explanation
Option A
• 'Forerunner' refers to a person or thing that precedes the coming or development of someone or something else.
• Synonyms: Precursor, predecessor, pioneer, ancestor.
• 'Successor' is an antonym (comes after), while 'Opponent' and 'Adversary' mean enemy or rival.
• Therefore, option A ('Precursor') is the correct answer.