In a certain code language,'bring the white board' is written as 'ka na di pa' and 'white and black board' is written as 'na di sa ra'. How is 'the' 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?

If wall is called window,window is called door,door is called floor,floor is called roof and roof is called ventilator,what will a person stand on?

If in a certain language $DISPEL$ is coded as $IDPSLE$,how is $EFFECT$ coded in that language?

If 'tee see pee' means 'Drink fruit juice','see kee lee' means 'Juice is sweet' and 'lee ree mee' means 'He is intelligent',which word in that language means 'sweet'?

If in a certain language $PORCELAIN$ is coded as $QOSCFLBJO$,which word is coded as $BKMOUSPP$?