Under standard alphabetical filing rules, which name is filed first: Juan dela Cruz, Juan Del Rosario, Juan De Guzman, Juan Delos Santos?
Correct answer: C. Juan De Guzman
Prefixes are part of the surname and spaces are ignored, so the units are "deguzman", "delacruz", "delosantos" and "delrosario". Comparing letter by letter, "deg" comes before "del", so De Guzman is filed first.
hard