Mitochondria are not present in :-

Here is a more detailed explanation of each option:

• Option (a), algae, are eukaryotes. Eukaryotes are cells that have a nucleus and other organelles. Mitochondria are one type of organelle that is found in eukaryotic cells. They are responsible for energy production.
• Option (b), bacteria, are prokaryotes. Prokaryotes are cells that do not have a nucleus or other organelles. Mitochondria are not found in prokaryotic cells.
• Option (c), fungi, are eukaryotes. Eukaryotes are cells that have a nucleus and other organelles. Mitochondria are one type of organelle that is found in eukaryotic cells. They are responsible for energy production.
• Option (d), protozoa, are a diverse group of eukaryotes. Some protozoa do have mitochondria, while others do not. The presence or absence of mitochondria is one of the ways that protozoa are classified.