What are the 5 yamas (one of the eight limbs of yoga)?

a) Ahimsa, Satya, Asteya, Brahmacharya, Aparigraha
b) Niyama, Asana, Pranayama, Pratyahara, Dharana
c) Samadhi, Yama, Jnana, Vairagya, Samyama
d) Hatha, Kundalini, Vinyasa, Ashtanga, Iyengar