Sister sold our joint property without informing me, what can I do?

I am from Kolkata, and I just discovered that my sister sold a piece of property that we inherited from our parents. We both had equal ownership of this property, but she went ahead and sold it without consulting or informing me, claiming she needed the money urgently. I feel utterly betrayed and don't know what my legal options are. Can I challenge the sale and what are my rights in this matter?