Hello,

Yes, you can study law in undergraduate level after passing in 10+2 in Arts stream. The eligibility criteria to pursue undergraduate law course is that a candidate must have passed 10+2 in any stream from a recognised board. The admission may depend on merit in entrance examination. There are various Institutes offering law courses and each has it's own admission requirements. Please check the eligibility requirements before considering for admission. Click the link below to check the various law entrance examination

https://law.careers360.com/exams

You have to appear for the entrance exam and qualify in it to be eligible to get admission.