Which one of the following statements is NOT true regarding hashing methods for file searching?

a$.$

In modulo division hashing, the key is divided by the file size and the remainder plus one is used for the address of the record.

b$.$

In digit extraction hashing, selected digits are extracted from the key and used as the address of the record.

c$.$

In direct hashing, no algorithmic manipulation is done, so the file must contain a record for each possible key.

d$.$

Modulo division hashing guarantees no collisions or synonyms