The correct answer is: C. Sengge Namgyal
Kanishka was a Kushan emperor who ruled in the 2nd century AD. Mihirkula was a Huna king who ruled in the 6th century AD. Balban was a Mamluk sultan who ruled in the 13th century AD. Sengge Namgyal was a Ladakhi king who ruled in the 17th century AD.
Kanishka was a great conqueror who extended his empire from Central Asia to the Indian subcontinent. He was also a patron of Buddhism and is credited with spreading the religion to Central Asia.
Mihirkula was a ruthless ruler who is known for his persecution of Buddhists. He was eventually killed by a Buddhist monk.
Balban was a powerful sultan who is credited with restoring order to the Delhi Sultanate. He was also a patron of the arts and literature.
Sengge Namgyal was a Ladakhi king who is known for his resistance to the Mughal Empire. He was able to keep Ladakh independent from Mughal rule for over 50 years.
In conclusion, the correct answer to the question “Which king ruled over Ladakh in 6th Century AD?” is C. Sengge Namgyal.