The correct answer is: a) Kagyu sect.
Pemayangtse Monastery is a Buddhist monastery in Sikkim, India. It was founded in 1672 by Ngawang Namgyal, the first Chogyal of Sikkim. The monastery is the seat of the Pemayangtse Rinpoche, the head of the Kagyu school of Tibetan Buddhism.
The Kagyu school is one of the four major schools of Tibetan Buddhism. It was founded by Marpa Lotsawa, who received teachings from the Indian master Naropa. The Kagyu school emphasizes the practice of Mahamudra, a form of meditation that focuses on the nature of mind.
The other three major schools of Tibetan Buddhism are the Gelug, Sakya, and Nyingma schools. The Gelug school is the largest school of Tibetan Buddhism. It was founded by Tsongkhapa, who is considered to be the founder of modern Tibetan Buddhism. The Sakya school is the second largest school of Tibetan Buddhism. It was founded by Sachen Kunga Nyingpo, who is considered to be the founder of the Sakya tradition of Tibetan Buddhism. The Nyingma school is the oldest school of Tibetan Buddhism. It was founded by Padmasambhava, who is considered to be the founder of Tibetan Buddhism.
I hope this helps!