Hi Durgesh,
This app i.e. Careers360 App can't provide you with the Allhabad University entrance exam book for BA in Hindi language of Arihant Publications because doing so will break the Copyright rules of Arihant Publications publishing company. If you want that book then there is no way to get that other than buying it from an online or offline store.
Feel free to ask doubts in the Comment Section.
I hope this information helps you.
Good Luck!
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