Statement I: True. Raga Malkauns is a pentatonic raga, excluding Re (Rishabh) and Pa (Pancham). Its notes are Sa, komal Ga, shuddha Ma, komal Dha, and komal Ni.
Statement II: False. Inayat Khan and Vilayat Khan were renowned sitarists. Vilayat Khan was the son of Enayat Khan, not the disciple of Inayat Khan, thus they were not in a direct guru-disciple relationship.
Consequently, only Statement I is accurate.