Generally the parties plead and court grants most divorces without regard to fault. The court finds that the marriage has become insupportable because of discord or conflict of personalities that destroy the legitimate ends of a marital relationship and prevents any reasonable expectation of reconciliation. At fault grounds for a divorce in favor of one spouse or the other may include the following:
a. Cruelty;
b. Adultery;
c. Conviction of a Felony and has been imprisoned for at least one year;
d. Abandonment where the spouse left with intention of abandonment and remained away for a year;
e. Living apart for at least three years without cohabitation; or
f. Confinement in mental hospital for a least three years and it appears that the disorder is of such a decree and nature that adjustment is unlikely or if it does occur, relapse is probable.