Ezra Cup is related to which of the following sports?

The Ezra Cup is a popular polo tournament conducted annually in India. The Calcutta Polo Club runs this oldest and first-ever Polo Trophy.  The first Ezra Cup was held in 1880. After a period of inactivity, it has now been revived by Mr. Keshav Bangur, Calcutta Polo Club's president. 

Ezra Cup is named after David Elias Ezra, a leading Jewish business tycoon in Calcutta who patronized the sport in the city. As part of its 150 years celebration, the Calcutta Polo Club organized Ezra World Cup at the Pat Williamson Ground in Kolkata from 18–25 December 2011. It has been doing so since 2006 when the polo was revived in Kolkata by Calcutta Polo Club president Keshav Bangur.

After years of neglect, the Calcutta Polo Club was put in cold storage by the army in 1998 through a resolution and the season was revived in 2006, at the initiative of Keshav Bangur. We are happy that the army is cooperating with us to make the season a success now and hope to get their continued support going forward this was said by Keshav Bangur, CPC's current president.