I. INTRODUCTION  

II. BACKGROUND  

III. XAI DEPLOYMENT ON O-RAN  

V. XAI FOR O-RAN USE-CASES  

VI. AUTOMATION OF AI/XAI PIPELINE FOR O-RAN  

VII. O-RAN SECURITY ASPECTS AND XAI  

VIII. PROJECTS/STANDARDS ON XAI FOR O-RAN  

IX. OPEN CHALLENGES AND FUTURE RESEARCH DIRECTIONS  

X. CONCLUSION