Triple

Target entity: Frederick Roberts, 1st Earl Roberts
Context triple: [Battle of Bergendal, commander, Frederick Roberts, 1st Earl Roberts]

• A. Frederick Sleigh Roberts, 1st Earl Roberts chosen
  Frederick Sleigh Roberts, 1st Earl Roberts, was a prominent British Army field marshal and one of the most celebrated military commanders of the Victorian era, noted for his service in India and the Second Boer War.
• B. Major-General Frederick Roberts
  Major-General Frederick Roberts was a distinguished British Army officer and later Field Marshal, renowned for his leadership in the Second Anglo-Afghan War and as one of the most celebrated Victorian military commanders.
• C. Walter Lawry Buller
  Walter Lawry Buller was a 19th-century New Zealand lawyer, politician, and pioneering ornithologist best known for his influential works on the birds of New Zealand.
• D. Sir Henry Hardinge
  Sir Henry Hardinge was a British soldier and statesman who served as Governor-General of India and played a leading role in British military campaigns on the subcontinent in the mid-19th century.
• E. Viscount Wolseley
  Viscount Wolseley was a prominent 19th-century British Army officer and military reformer renowned for his leadership in numerous imperial campaigns and for modernizing the British armed forces.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.