Concept:Citizenship by birth is a natural and permanent status that a person does not apply for.
Explanation:Citizenship by birth is acquired automatically through place of birth or parentage.
Because the person never applied for it, the government cannot withdraw it against the person's will.
It remains valid for life except in rare cases of voluntary renunciation.
Citizenship by naturalization is granted on application and can be revoked for serious reasons.
Honorary citizenship is a privilege given by the state and can also be withdrawn.
Citizenship by conquest is a status determined by political authority and is not a permanent personal right.
Therefore, among all the options, birth citizenship is the one that cannot be withdrawn.
Answer:The correct answer is B. Citizenship by birth.