Relation R on the set $A= \{1,2, ....... 15\}$ defined as $R = \{(x, y): y- 4x = 0\}$ is
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Neither Reflexive nor symmetric
Relation $R$ on $A=\{1,2,\ldots,15\}$ is defined by:
$R=\{(x,y)\;:\; y-4x=0\}$
So $y=4x$.
Check reflexive: For reflexivity, each element must satisfy $(x,x)\in R$.
That requires $x=4x\;\Rightarrow\;3x=0$ which is impossible for any $x\in A$.
So $R$ is not reflexive.
Check symmetric: If $(x,y)\in R$, then $y=4x$. For symmetry, $(y,x)$ should satisfy $x=4y$.
But $x=4y=16x$ gives $15x=0$, impossible for $x\in A$.
Thus symmetry fails.
Hence $R$ is:
Neither reflexive nor symmetric.