Let's begin by listing out the information given to us:
[tex]\mleft\{\mleft(1,2\mright).\mleft(3,4\mright),\mleft(5,6\mright),\mleft(1,9\mright)\mright\}[/tex]When we observe the ordered pairs closely, we will see a trend:
[tex]\begin{gathered} (x,y)=(x,x+1);y=x+1 \\ (1,2)=(1,1+1) \\ (3,4)=(3,3+1) \\ (5,6)=(5,5+1) \\ (1,9)=(1,1+8) \\ \\ \therefore(1,9)\text{ is the anomaly} \end{gathered}[/tex]When (1, 9) is omitted from the set, these ordered pairs become a function. Hence, option d is the correct answer
