Correct option is A
The correct antonym of the given word is
(a) Assault.
Bulwark: A strong wall-like defense or protection. (रक्षा या दीवार)
Example: The army acted as a
bulwark against invasion.
Assault: A violent attack. (आक्रमण) — which is the
opposite of defense.
Example: The camp was under a sudden
assault from enemy troops.
Synonyms: rampart, bastion, stronghold, fortification.
Antonyms: assault, attack, invasion, offensive.
Meanings of all the given options:
· (a)
Assault: A physical or violent attack (आक्रमण)
· (b)
Rampart: A defensive wall (रक्षा दीवार)
· (c)
Bastion: A projecting part of a fortification (गढ़)
· (d)
Fortification: A military defense structure (किला, सुरक्षा दीवार)