Match the columns.

Colum-A (Class)	Column-B (Common name)
i. Chlorophyceae	a. Brown algae
ii. Phaeophyceae	b. Green algae
iii. Rhodophyceae	c. Blue-green algae
iv. Cyanophyceae	d. Red algae

Correct option is B

The correct answer is (b) i-b, ii-a, iii-d, iv-c.

• i. Chlorophyceae - b. Green algae: Chlorophyceae is the class of green algae, characterized by the presence of chlorophyll a and b.
• ii. Phaeophyceae - a. Brown algae: Phaeophyceae is the class of brown algae, containing the pigment fucoxanthin, which gives them a brown color.
• iii. Rhodophyceae - d. Red algae: Rhodophyceae is the class of red algae, which contain the pigments phycoerythrin and phycocyanin, giving them a red color.
• iv. Cyanophyceae - c. Blue-green algae: Cyanophyceae, also known as cyanobacteria, are commonly referred to as blue-green algae and are characterized by their cyan color due to the pigment phycocyanin.

Information Booster:

• Green Algae (Chlorophyceae): Found in freshwater environments, used in biofuel production.
• Brown Algae (Phaeophyceae): Includes seaweeds like kelps, important in marine ecosystems.
• Red Algae (Rhodophyceae): Known for producing agar and carrageenan, used in food and pharmaceutical industries.
• Blue-Green Algae (Cyanophyceae): Capable of nitrogen fixation, play a crucial role in aquatic ecosystems.