In a certain code, '37' means 'which class' and '583' means 'caste and class'. What is the code for 'caste' ?

E. EITHER 5 OR 8

In a certain code language, '123' means 'bright little boy',
'145' means 'tall big boy' and
'637' means 'beautiful little flower'.
Which digit in that language means 'bright' ?

E. NONE OF THESE

If in a certain code language, '324' means 'Light is bright', '629' means 'Girl is beautiful' and '4758' means 'I prefer bright clothes', which digit means 'Light' in that language ?

A. 3

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 ?

C. 8B

In a certain code language, '123' means 'hot filtered coftee' ; '356' means 'very hot day' and '589' means 'day and night'. Which digit stands for 'very' ?

E. 6