The correct answer is: C. Rin-Chen
Rin-Chen was a Tibetan Buddhist monk who established the Lha-Chen dynasty in Ladakh in the 11th century. He was a disciple of Atisha, the great Indian Buddhist master, and he brought the teachings of Atisha to Ladakh. Rin-Chen was a great teacher and a wise ruler, and he is considered to be the founder of the Ladakhi Buddhist tradition.
Nemagon was a Ladakhi king who ruled in the 9th century. He was a great warrior and he expanded the Ladakhi kingdom. However, he was not a Buddhist and he did not establish the Lha-Chen dynasty.
Yashes-Od was a Ladakhi king who ruled in the 10th century. He was a Buddhist and he built many Buddhist temples in Ladakh. However, he did not establish the Lha-Chen dynasty.
Naglug was a Ladakhi king who ruled in the 12th century. He was a Buddhist and he was a great patron of the arts. However, he did not establish the Lha-Chen dynasty.