To compare a String in Solidity you use:
A) string1 == string2
B) the internal function "str_compare(str1,str2)"
C) you can't directly compare two strings, but one method would be to hash both strings and compare the hashes.
D) bytes32(string1) == bytes32(string2)

Question

Quizplus · Accepted Answer

In Solidity, strings cannot be directly compared using the equality operator. A common method is to hash both strings using keccak256 and compare the resulting hashes.

To Compare a String in Solidity You Use