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Which of the following set is an infinite set ?

(a) A = {`x : x` is an integer and `-1 \le x\lt 1`}, (b) B = set of even negative integers greater than `-100`, (c) C = set of positive integers less than 100, (d) D = {`x : x` is real and `-1 \le x\lt 1`}

(a) A = {`x : x` is an integer and `-1 \le x\lt 1`}, (b) B = set of even negative integers greater than `-100`, (c) C = set of positive integers less than 100, (d) D = {`x : x` is real and `-1 \le x\lt 1`}

Ans: (d) D = {`x : x` is real and `-1 \le x\lt 1`}