What is the largest discovered star? (by radius)

VY Canis Majoris
V396 Centauri
UY Scuti
Alfa Persei
UY Scuti is a bright red supergiant and pulsating variable star in the constellation Scutum. It is currently the largest known star by radius and is also one of the most luminous of its kind. It has an estimated radius of 1,708 solar radii (1.188×109 kilometres; 7.94 astronomical units); thus a volume nearly 5 billion times that of the Sun. It is approximately 2.9 kiloparsecs (9,500 light-years) from Earth. If placed at the center of the Solar System, its photosphere would at least engulf the orbit of Jupiter.
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Answers by country

VY Canis Majoris
V396 Centauri
UY Scuti
Alfa Persei
answers
flagthe United States
16%
22%
52%
8%
92
flagIndia
23%
23%
46%
5%
167
flagCanada
18%
27%
45%
9%
11
flagAustralia
26%
21%
42%
10%
19
flagAustria
27%
29%
32%
10%
37
flagPoland
27%
30%
29%
11%
2821
flagSwitzerland
25%
37%
25%
12%
16
flagthe United Kingdom
30%
36%
24%
8%
49
flagRepublic of Ireland
46%
23%
23%
7%
13
flagGermany
41%
23%
19%
15%
212
flagthe Philippines
46%
46%
7%
0%
13