There are some Conventions that Arrow ( $\rightarrow$) Mark represents $One$ and Straight line ( $-$) represents $Many$, Hence here One to One Relationship.
And Single line represents Partial Participation and Double line represents Total Participation.. Hence here, $E1$ is having Total Participation in the Relationship $R$ and $E2$ is having Partial relationship in $R$.
Now, Because of Total Participation of $E1$, $R$ has to contain at least $n$ rows. But Because of One to One relationship, We can't have more than $n$ rows in $R$ (Try it and see)
Hence answer would be Option $C$ But with added condition that $m > n$