Countries like the UK, US, Canada, Australia, New Zealand, Italy etc. allow dual citizenship, wherein you can be a citizen of 2 or more countries. In case of countries like India, Singapore, Austria, Saudi Arabia etc. their constitution doesn’t allow dual citizenship, you cannot get Indian Passport or voting rights if you are a citizen of any other country. However, if an applicant wants to be only on a PR in the migrating country can continue his/her citizenship with India.