Answer:
The correct answer is A. The Indo-Australian plate and the Eurasian plate are primarily responsible for the creation of the Himalayan Mountains. The Indian subcontinent was originally a separate landmass that began to collide with the Eurasian plate around 50 million years ago. The continued convergence of these two plates resulted in the formation of the Himalayan range. The Indian subcontinent was part of the larger Indo-Australian plate at the time of collision.