pragma solidity ^0.5.1;

contract and {

    string d = "Hello";

    function getValueOfabc() public view returns(string) {
        return d;
    }
}

browser/mulreturn.sol:7:50: TypeError: Data location must be "memory" for return parameter in function, but none was given.
    function getValueOfabc() public view returns(string) {
                                                 ^----^