The given sentence is divided into 4 parts. Read the following sentence and determine whether there is any error in it. The error, if any, can be in one or more than one part of the sentence. If the sentence is error-free, select ‘No error’ as your answer.

Each and every student who have (A)/ graduated from our university (B)/ has studied English with a (C)/ native speaker for at least two years.(D)/