Hi, so basically the optional subject you had in your bachelor's degree, i am assuming you have done Bsc CS. To be eligible for MA English it is preferred that you should've done BA English, however Bsc would do too.
So its fine if you've done Bsc and you are applying for MA English, you are definitely eligible for MA in English.
Hope this is helpful.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile