Which of the following statement is incorrect about Thomas Malthus?

The correct answer is Option 3: He gave the theory of demographic transition

Option 1: He studied at Cambridge and trained to become a Christian priest. Correct. 

Option 2: He was later appointed Professor of History and Political Economy at the East India Company College at Haileybury near London, which was a training centre for the officers recruited to the Indian Civil Service. Correct. 

Option 3: He gave the theory of demographic transition. Incorrect. The demographic transition theory was developed by later demographers and is distinct from Malthus's theory of population growth.