Answer: The correct option is
(b) 1.
Step-by-step explanation: We are given to find the value of c for which the following relation is a function :
R = {(2,8) (12,3) (c,4) (-1,8) (0,3)}.
We know that
a relation is a function if each first element is associated with only one second element.
Since the first elements in R are 2, 12, -1 and 0, so, the value of c cannot be equal to these four values.
Therefore, the only option for c is 1.
Thus, c = 1.
Option (b) is CORRECT.
