The correct answer is: B. Padmasambhava
Padmasambhava, also known as Guru Rinpoche, is considered to be the founder of Tibetan Buddhism. He was a tantric master who is said to have brought Buddhism to Tibet in the 8th century. He is also credited with subduing the local spirits and establishing the foundations of Tibetan Buddhism.
Tsechu is a Tibetan Buddhist festival that is held in the spring. It is a time for celebration and for paying homage to the Buddha.
Matho Nagrang is a Tibetan Buddhist monastery that is located in the Kham region of Tibet. It was founded in the 12th century by the Indian master Atisha.
Gelukpa is one of the four major schools of Tibetan Buddhism. It was founded in the 14th century by Tsongkhapa.
I hope this helps!