B.A

Of course, it is. The CUET exam pattern has 3 sections: Domain-Specific, Language, and General Test. The other two sections remain the same for every candidate, but the Domain-Specific section is based on the subjects you chose at the time of CUET form-filling. The admission to the BA specialisation will also be based on those subjects only.

Around 9,000 private BA colleges in India are offering BA programs in different specializations. Their fee structure differs depending on their rating, placement records, location, infrastructure, faculty rating, and so on. Therefore, the fee range is vast, starting from INR 900 to INR 43.6 Lakh.

Every BA course pursued from DU is the best. But a few specializations that are highly-regarded in DU colleges are BA (Hons) Political Science, BA (Hons) Economics, BA (Hons) English, BA (Hons) History, and BA (Hons) Psychology. Gargi College, Hansraj College, LSR College, Hindu College, Kirori Mal College, Miranda House, Ramjas College, etc., are some great options for BA courses, and the admissions are based on a merit system.

More than 18,000 colleges in India are offering BA courses in a variety of specializations. The fee structure of these colleges can vary depending on their entity type, faculty rating, college rating, infrastructure, placement records, etc. But the average course fee of these colleges starts from INR 1,000 and goes up to INR 40 Lakh. 
The difference between the fee range is vast because the number of colleges is huge, and their curriculum, placements, industrial tie-ups, etc., vary.

The BA is a base-level course, where you choose a specific area of study and pursue the course accordingly. For example, BA History, BA Geography, BA Hindi, BA English, BA German, BA French, BA Psychology, and so on. You'll find over 100 BA specializations to choose from. It's a vast field; hence, the subjects also vary depending on the specialization. 
But most BA programs start their curriculum with basic subjects to give students a foundational knowledge of what they are going to explore in the coming years.

The exact BA course duration is 3 years in India, but it also depends on the type of BA course you choose. The NEP (National Education Policy) of India has offered freedom for students to choose, whether they wish to pursue a BA course in 4 or 3-year duration. I believe they only provide this choice to students pursuing a BA (Hons) with specialization, and not for a general BA.