Yes we can select Link types as "1 cardinality simple link" to get 1-1 relationship but what had happening is it was not getting reverse link as 1-1 relationship.. So if we can set revCardinality="Single" then the reverese link also will be 1-1 relationship which will satisfy our business case.
ex: We have created new schema and linked profile "1 cardinality simple link" with respect to one business field key. when we verify from new schema the profile is linked with 1-1 relationship where when we verify from profile table the link of new schema shows as 1-N releationship.
Seems like ACS still not having revCardinality="Single" parameter to use at 18.2 version. Let me know if any alternate or work around solution for this issue.