C++ MQCs with Explanation ( WORKING WITH FILES)

Given below is the definition of a function template template [class T] T mul (x, y) { return x * y; } Identify errors, if any

1. class T in the first line should be within angle brackets < and >
2. The type of arguments of mul function must be declared as T
3. Both a and b
4. No error

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Answer: 

Option c: Both a and b

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Explanation Here