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Which string function returns the index of the first occurrence of substring?
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- INFSTR()
- INSTRING()
- INSTR()
- INSERT()
- None of these
Correct Option: C
The string funtion ‘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.