Which of the following types of citizenship cannot be withdrawn?

Citizenship by birth cannot be withdrawn. Citizenship by birth means that an individual automatically becomes a citizen of a country based on their place of birth, regardless of the citizenship of their parents. This type of citizenship is often referred to as "jus soli" citizenship. Once an individual has acquired citizenship by birth, it cannot be taken away unless there are specific circumstances, such as if the individual has committed a serious crime or has been found to have obtained their citizenship fraudulently. This type of citizenship is considered to be the most secure, as it is based on a person's fundamental right to a nationality and cannot be taken away without due process.