Identify the correct sequence in descending order of the following language families in terms of the number of people speaking them.
1
Indo-European, Sino-Tibetan, Niger-Congo, Afro-Asiatic
2
Afro-Asiatic, Sino-Tibetan, Indo-European, Niger-Congo
3
Sino-Tibetan, Afro-Asiatic, Indo-European, Niger-Congo
4
Indo-European, Afro-Asiatic, Sino-Tibetan, Niger-Congo