In a certain code,$3456$ is coded as $ROPE$,$15526$ is coded as $APPLE$,then how is $54613$ coded?

In a certain code,$MIGHT$ is written as $LHFGS$. How is $BELOW$ written in that code?

If in a certain language,$MACHINE$ is coded as $LBBIHOD$,which word would be coded as $SLTMFNB$?

If rain is water,water is road,road is cloud,cloud is sky,sky is sea and sea is path,where do aeroplanes fly?

If train is called bus,bus is called tractor,tractor is called car,car is called scooter,scooter is called bicycle,bicycle is called moped,which is used to plough a field?

The word $EXPAND$ has been written in four different codes by applying four different rules. $A$ word $TRAVELLER$ has been written in one of these codes. Identify the correct code for $TRAVELLER$ from the given options.
$EXPAND$ $(a)$ $FYQBOE$ $(b)$ $EPDTCR$ $(c)$ $GYRBPE$ $(d)$ $CWNZLC$
$TRAVELLER$ : ?