Question:What is the correct prototype of checkdnsrr() function? 

A str checkdnsrr(string host[,string type]) 
B bool checkdnsrr ( string $host [, string $type = "MX" ] ) 
C int checkdnsr(string host[,string type]) 
D int checkdnsrr(string type[,string host]) 

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B 

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Md Bashir Rayhan

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