সঠিক উত্তর হচ্ছে: careless
ব্যাখ্যা:
Vigilant : keeping careful watch for possible danger or difficulties.
Irresponsible : (of a person, attitude, or action) not showing a proper sense of responsibility.
Ignorant : lacking knowledge or awareness in general; uneducated or unsophisticated.
Careless : not giving sufficient attention or thought to avoiding harm or errors.
Innocent : not guilty of a crime or offence.
Antonym of
Vigilant is
Careless