In a certain code,$INSTITUTION$ is written as $NOITUTITSNI$. How is $PERFECTION$ written in that code?

In a certain code $RAIL$ is written as $5796$ and $TAPE$ is written as $3748$. How is $PAIR$ written in that code?

In a certain code language,'$3a, 2b, 7c$' means 'Truth is Eternal','$7c, 9a, 8b, 3a$' means 'Enmity is not Eternal' and '$9a, 4d, 2b, 8b$' means 'Truth does not perish'. Which of the following means 'enmity' in that language?

In a certain code $BOND$ is written as $1543$ and $DEAN$ is written as $3864$. How is $BED$ written in that code?

In a certain code language,
$(A)$ 'mxy das zci' means 'good little frock'
$(B)$ 'jmx cos zci' means 'girl behaves good'
$(C)$ 'nvg drs cos' means 'girl makes mischief'
$(D)$ 'das ajp cos' means 'little girl fell'
Which of the given statements is superfluous?

In a certain code,$EXPLAINING$ is written as $PXEALNIGNI$. How is $PRODUCED$ written in that code?