Question

If $S \subset B \times C$ be two relations, then

.

• A. $S ^ { - 1 } o R ^ { - 1 }$
• B. $R ^ { - 1 } o S ^ { - 1 }$
• C.
• D.

Answer 1

Answer: (B)

$R ^ { - 1 } o S ^ { - 1 }$

Answer 2

It is obvious.