The correct answer is: None of the above.
Rgyalbu Rin-Chen, Tagspa Bam Lde, Tagspa Bum, and Lha-Chen Utpala were all Buddhist kings of Ladakh. There is no record of any Ladakhi king adopting the religion of Islam.
Islam is a monotheistic religion that originated in the 7th century CE in the Arabian Peninsula. It is the world’s second-largest religion, with over 1.8 billion followers. Muslims believe in one God, Allah, and that Muhammad is his prophet. The five pillars of Islam are Shahadah (the declaration of faith), Salat (prayer), Zakat (almsgiving), Sawm (fasting during Ramadan), and Hajj (pilgrimage to Mecca).
Ladakh is a region in the Indian state of Jammu and Kashmir. It is a mountainous region with a population of over 200,000 people. The majority of Ladakhis are Buddhist, with a small minority of Muslims.