Explanation:

It relaxed previously stringent control of the centre over the provinces, which led to the establishment of a Federal Structure: This statement is incorrect. The Government of India Act 1919 did introduce certain measures to devolve powers to the provinces, but it did not establish a full-fledged federal structure. It introduced a system of dyarchy in the provinces, where certain powers were transferred to Indian ministers, but key areas remained under the control of the British-appointed governors.

It increased the franchise base of Central as well as provincial legislature: This statement is correct. The Act expanded the franchise, allowing a larger section of the population to participate in the electoral process for both the central and provincial legislatures.

The genesis of the tradition of the President’s address to both houses of the Parliament can be traced from this act: This statement is correct. The Government of India Act 1919 introduced the provision for the Governor-General (later the President of India) to address both houses of the legislature. This tradition continued after the enactment of the Constitution of India in 1950.