Question

The restriction on $n,k$ and $p$ so that $PY+WY$ will be defined are:

• A. $k=3,p=n$
• B. $k$ is arbitary, $p=2$
• C. $p$ is arbitary, $k=3$
• D. $k=2,p=3$

Answer 1

The correct option is A $k=3,p=n$

In this, order of $P=p\times k$

Order of $W=n\times 3$

Order of $Y=3\times k$

Thus, order of $PY=p\times k$, when $k=3.$

And the order of $WY=p\times k,$ where $p=n$

Thus option (A) is correct.