Euglena and Paramecium differ from each other in several ways, let's compare.
Euglena
• Is photosynthetic
,
• Has flagella
,
• Has a red eyespot
,
• Has one nucleus
Paramecium
• Is heterotrophic
,
• Has cilia
,
• Does not have an eyespot
,
• Has a macronucleus and a micronucleus
Given this, the correct answer is A