<P> The presiding officer (or speaker) of the Assembly was called the President . While the Government of India Act 1919 provided for the President to be elected, it made an exception in the case of the first President, who was to be appointed by the Government . The Governor - General appointed Frederick Whyte, a former Liberal member of the British House of Commons who had been a parliamentary private secretary to Winston Churchill . Sachchidananda Sinha was the Deputy President of Assembly in 1921 . </P> <P> Ganesh Vasudev Mavlankar was the last President of the Assembly till the Assembly came to an end on 14 August 1947 . He became the first Speaker of the Constituent Assembly of India, and in 1952 the first Speaker of the Lok Sabha, the lower house of the Parliament of India .) </P> <Table> <Tr> <Th> No </Th> <Th> Image </Th> <Th> President </Th> <Th> Tenure </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Frederick Whyte </Td> <Td> 3 February 1921--23 August 1925 </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Vithalbhai Patel </Td> <Td> 24 August 1925--April 1930 </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Sir Muhammad Yakub </Td> <Td> 9 July 1930--31 July 1931 </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Ibrahim Rahimtoola </Td> <Td> 17 January 1931--7 March 1933 </Td> </Tr> <Tr> <Td> 5 </Td> <Td> </Td> <Td> R.K. Shanmukham Chetty </Td> <Td> 14 March 1933--31 December 1934 </Td> </Tr> <Tr> <Td> 6 </Td> <Td> </Td> <Td> Sir Abdur Rahim </Td> <Td> 24 January 1935--1 October 1945 </Td> </Tr> <Tr> <Td> 7 </Td> <Td> </Td> <Td> Ganesh Vasudev Mavlankar </Td> <Td> 24 January 1946--14 August 1947 </Td> </Tr> </Table> <Tr> <Th> No </Th> <Th> Image </Th> <Th> President </Th> <Th> Tenure </Th> </Tr>

Who was the national leader to be elected as speaker of central legislative assembly in 1925
find me the text answering this question