I have passed class 12th with Arts and now I want to get the details of subjects which are necessary to choose in BA after 12th standard with Arts stream to become an IPS officer so can you provide me that?

As you want to get the details of subjects which are necessary to choose in BA after 12th standard with Arts stream to become an IPS officer so here is the information of the same for you:

There is no issue for choosing the subjects in BA

The general eligibility criteria for the IPS officer is that candidates must have passed graduation of any of Universities incorporated by an Act of the Central or State Legislature in India or other educational institutions established by an Act of Parliament or declared to be deemed as a University Under Section-3 of the University Grants Commission Act, 1956, or possess an equivalent qualification.

IPS is an central service and also deeply regarded as The most prestigious job

For IPS you need to write CSAT exam.

CSAT consists of two paper and each paper of Two hrs

(Paper 1) (200 marks) consists of
Current events.
History
Geography
Indian Polity and governance
Economic and social development
and General science.

It is of purely objective type and qualifying exam...

(Paper II) (200 marks)
Comprehension
Logical reasoning and analytical ability
Decision making and problem solving
General mental ability
Basic numeracy(Class X level)
English language comprehension skills (Class X level)