Correct Answer: A.V. Leeuwenhoek

Solution : The correct answer is A.V. Leeuwenhoek.

Bacteria was discovered by Antonie Van Leeuwenhoek in 1676. He is widely acknowledged as the Father of microbiology. He was a Dutch microbiologist. He discovered both bacteria and protists. Bacteria are prokaryotic organisms belonging to Monera Kingdom. They are single celled organism and they are characterised by the absence of nucleus and cell organelles.