उत्तर : 4. "राइट वन्स रोड मैनी (WORM) डिस्क"
व्याख्या :

1. Compact Disc Recordable (CDR) is a write-once-read-many (WORM) disc.

2. CD-R stands for Compact Disc Recordable and is a digital optical disc storage format.

3. A CD-R disc is a compact disc that can be written once and read multiple times freely.