Which one of the following does not refer to the bow (and arrow) as a weapon of war in ancient India ?

Kunta refers to a spear or lance in ancient Indian weaponry, not a bow. Sharnga (or Sarnga) is the famous bow of Lord Vishnu. Kodanda is the legendary bow of Lord Rama. Karmuka is another Sanskrit term for bow. All three — Sharnga, Kodanda, and Karmuka — denote varieties or names of bows used as weapons of war in ancient India, while Kunta is distinctly a spear.