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The string function that returns the index of the first occurrence of substring is _____________.
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- INSTRING()
- INSERT()
- INFSTR()
- INSTR()
- None of these
Correct Option: D
The string function ‘INSTR()’ is used to return the index of the first occurrence of the substring. The function ‘INSERT()’ is used to insert a substring at the specified position up to the specified number of characters.