10 INR International Yoga Day coin

I own this coin but it doesn't have any mint mark on it. How do I know which mint's coin do I own?
Please help me out.

It's always easier with pictures. If you can't tell with the coin in hand, I don't know how anyone can know without pictures.

The Yoga day 10 rupees coins were very poorly minted so it is possible the mintmark is not visible because of a weak strike. Like ngdawa mentioned, can you please post an image. There may be faint traces of a mintmark in a zoomed photo...

So now that I've posted pic of the coin, now can someone resolve my doubt??

Abhishake, there is no way to confirm mint on your coin. Typically the mintmark is located under the date and it cannot be seen in the picture. The coin is very poorly struck

Indian coins are often weakly struck. I have UNC coins with barely visible designs. Unfortunately you're coin's mint mark is impossible to see in the picture. Try looking in different angles in different lightings and you might be able to see something that can give you a clue.

Yes,

but if it really doesn't have a mint mark it's Calcutta, no????

Ole