Complex sentence: Virtually all Armenians who are officially registered as part of the Armenian Minority are Christians, and either of the Armenian Apostolic, Catholic, or less commonly Protestant denominations, the case of others is elaborated on in the Demographics section.
Split into simpler sentences: Virtually all Armenians who are officially registered as part of the Armenian Minority are Christians, and are either of the Armenian Apostolic, Catholic, or less commonly Protestant denominations. The religion of others and those not officially part of the minority is elaborated on in the Demographics section.