Question

Correct statement from the following--

Natural selection discriminates variations
Natural selection brings about evolution
Natural selection is essential for evolutionary process
Natural selection is the other name of evolution

Answer 1

Natural selection discriminates variations: Not always, it may favor variations or act against them
Natural selection brings about evolution: Natural selection is a mechanism by which evolution takes place, however, it cannot be source of variations and can bring about evolution only if variations can emerge.
Natural selection is essential for evolutionary process: see previous statement
Natural selection is the other name of evolution: it is not, it is just (one of) the mechanism(s) of evolution.