Option b is the correct answer. The Karmapa Lama is the head of the Kagyupa school of Tibetan Buddhism. The Kagyupa school is one of the four major schools of Tibetan Buddhism and is known for its emphasis on meditation and the practice of Mahamudra. Important Tips Gelugpa: The Gelugpa school is the largest school of Tibetan Buddhism and is known for its emphasis on monasticism and scholarship. Sakyapa: The Sakyapa school is one of the four major schools of Tibetan Buddhism and is known for its emphasis on tantric Buddhism. Nyingmapa: The Nyingmapa school is the oldest school of Tibetan Buddhism and is known for its emphasis on the preservation of ancient texts and practices. Lingamapa: The Lingampa school is a small school of Tibetan Buddhism and is known for its emphasis on the practice of Vajrayana Buddhism.