Which eviction policy suits a pure cache where the least recently used entries should be discarded under memory pressure?

1. A noeviction
2. ✓ B allkeys-lru (correct answer)
3. C volatile-ttl
4. D allkeys-random

Shortcut: allkeys-lru evicts the least recently used key regardless of TTL, which is the standard choice for a cache. noeviction would instead return write errors when memory fills.