(A) Open
(B) Accessable
(C) Cowardly
(D) Hero
🧠 Explanation:
- “Dastard” means a cowardly or timid person who lacks bravery.
- An antonym would be someone who shows courage and fearlessness.
- A “Hero” represents bravery, strength, and willingness to face danger.
- Therefore, "Hero" is the correct antonym of “Dastard.”