c programming

main()
{
int a= 0,b = 20;
char x =1,y =10;

if(a,b,x,y)
printf("hello");
}
Answer:
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hello

Explanation:
The comma operator has associativity from left to right. Only the rightmost value is returnedand the other values are evaluated and ignored. Thus the value of last variable y is returned tocheck in if. Since it is a non zero value if becomes true so, "hello" will be printed