The correct option is B Altmann
The mitochondria was discovered by the Kolliker in 1857 while he was studying muscle cell of insect and called as a granule. But it was considered as organelle and its first structure was published by the Richard Altmann in 1894 and called them as "bioblasts". The term "mitochondria" was coined by Carl Benda in 1898. Thus, the correct answer is option B.