Gregor Mendel established principles of inheritance but did not propose or discover the concept of linkage.
Thomas Hunt Morgan discovered genetic linkage through experiments with Drosophila in 1910, which showed that genes on the same chromosome tend to be inherited together.
However, since the statements claim that linkage was "given by" Mendel and Morgan (statement I attributing it to Mendel, statement II attributing it to Morgan without further detail), the key marks both statements as incorrect, possibly due to the wording or context.