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

Answer: E. Either 5 or 8

In the given statements, the common code digit is '3' and the common word is 'class'.
So, '3' means 'close'.
Thus, in the second statement, either 5 or 8 stands for 'caste'.