Choose the correct option to fill in the blank:
"Prefixes (Upsarg) and Suffixes (Pratyay) both are word-fragments, they are not standalone ________."

Prefixes and suffixes do not qualify as independent, complete words on their own; instead, they are word-fragments (शब्दांश). Since they are part of a word rather than independent units, the blank establishes that they are morphemes or word fragments.