What is the utility used to test that slapd.conf is usable and minimally complete?

What is the utility used to test that slapd.conf is usable and minimally complete?

A.
slapdtest

B.
slaptest

C.
ldapsearch

D.
ldaptest

Explanation:
http://tldp.org/HOWTO/LDAP-HOWTO/ldapbackends.html ( see 1.3, second sentence)