Which of the following universities was famous for its specialized training in the subject of Tantric Buddhism?

Vikramashila was famed for its special training in Tantric Buddhism.

Nalanda taught a broad Buddhist curriculum and not chiefly Tantric practice.

Takshashila was an earlier north-western centre, not known for this training.

Odantapuri, though a vihara, is not the seat noted for Tantric specialisation.

Vikramashila's Vajrayana teaching drew monks seeking esoteric knowledge.

Scholars from here helped carry Tantric Buddhism into Tibet.