Which of these languages has no known relatives?

Hungarian
Korean
Arabic
Greek
With over 78 million speakers, Korean has more speakers than all other language isolates combined.
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Hungarian
Korean
Arabic
Greek
answers
flagSwitzerland
20%
66%
0%
13%
15
flagSweden
28%
64%
7%
0%
14
flagItaly
26%
56%
0%
17%
23
flagRussia
25%
53%
11%
7%
54
flagthe United Arab Emirates
33%
53%
13%
0%
15
flagSpain
45%
50%
0%
4%
24
flagDenmark
25%
50%
8%
16%
12
flagUnknown
26%
49%
12%
11%
370
flagPoland
29%
45%
10%
13%
6886
flagCanada
22%
44%
0%
33%
18
flagthe United States
28%
43%
15%
12%
173
flagUkraine
20%
43%
5%
30%
39
flagFrance
25%
43%
31%
0%
16
flagthe United Kingdom
36%
42%
10%
9%
176
flagIndia
25%
41%
12%
19%
31
flagJapan
33%
40%
13%
13%
15
flagGermany
32%
37%
6%
21%
95
flagthe Netherlands
48%
29%
6%
16%
31
flagNorway
36%
27%
13%
22%
22
flagRepublic of Ireland
52%
26%
10%
10%
19