Question: string str 1 = King; string str 2 = Arthur; Which of the following is equivalent to s t r 1 + = s t

string str1= "King";
string str2= "Arthur";
Which of the following is equivalent to str1+=str2?
str1=str1+str2
str2=str1+str2
str1=str2+str1
str 2=str2+str1
string str1= "King"; string str2= "Arthur"; Which of the following is

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