Which of the Statements is/are Correct?

Consider the following in respect of the equation y=(√(x-1)²)/(x-1)
1.y=1 if x>1
2.y=-1 if x<1
3. Y exists for all values of x
Which of the above statements is/are correct?
(a) 1 only                 (b) 2 only                (c) 1 and 2 only              (d) 1, 2 and 3