Kalyani is mother-in-law of Veena who is sister-in-law of Ashok. Dheerajis father of Sudeep, the only brother of Ashok. How is Kalyani related to Ashok?

Explanation:-

Veena is siter-in-law of Ashok means Ashok is the brother of Veena's husband. But Ashok has only one brother,Sudeep. So, Sudeep is Veena's husband.
Kalyani is mother-in-law of Veena means Kalyani is the mother-in-law of Veena's husband i.e., sudeep.
Since, Ashok is Sudeep's brother, so Kalyani is Ashok's mother.