In the set $A = \{1, 2, 3, 4, 5\}$,a relation $R$ is defined by $R = \{(x, y) | x, y \in A \text{ and } x < y\}$. Then $R$ is

If $R$ and $S$ are two non-empty relations on a set $A$,then which of the following statements is false?

$x^2 = xy$ is a relation which is

Let $R$ be a relation on $N \times N$ defined by $(a, b) R (c, d)$ if and only if $ad(b-c) = bc(a-d)$. Then $R$ is

Let $A$ be the set of all functions $f: \mathbb{Z} \rightarrow \mathbb{Z}$ and $R$ be a relation on $A$ such that $R =\{( f , g ): f(0)= g (1) \text{ and } f(1)= g (0)\}$. Then $R$ is:

For the set $A = \{1, 2, 3\}$,consider the relation $S = \{(1, 2), (2, 1), (2, 3)\}$ on $A$. Then,the relation $S$ is . . . . . . .