NDA 2017 — Mathematics PYQNDA | Mathematics | 2017If S = {x : x2 + 1 = 0, x is real}, then S isChoose the correct answer:A. {- 1}B. {0}C. {1}D. an empty set (Correct Answer)Correct Answer: an empty setA{- 1}B{0}C{1}Dan empty setShow Answer SExplanationNo text explanation available.