Correct option is A
The correct one-word for the given group of words is (a) Conscription.
Conscription refers to the mandatory enlistment of people into military service. (Hindi: जबरन सैन्य भर्ती)
Example: During the war, conscription was imposed on all able-bodied men.
Meanings of other options:
· (b) Abdication: Giving up a position of power (त्यागपत्र)
· (c) Armament: Weapons and military equipment (शस्त्र)
· (d) Militaristic: Advocating military values or solutions (सैन्यवादी)