Match column I with column II and select the correct option from the codes given below.

Column I	Column II
A. Spirogyra	(i) Unicellular
B Chlamydomonas	(ii) Filamentous
C Volvox	(iii) Colonial form
D.Some giant marine forms	(iv) Kelps

The correct option is A A-(ii), B-(i), C-(iii), D-(iv)

• Spirogyra is a filamentous algae, commonly found in freshwater, ditches, and ponds. It is also known as pond silk, as it's filament shine like a silk thread due to the presence of mucilage.
• Chlamydomonas is a green algae found in stagnant water and damp soil and also in fresh and sea water, even in snow as " snow algae ". It is a unicellular flagellate.
• Volvox green algae and forms spherical colonies. They live in freshwater habitats.
• Kelps are the large brown algae and grow in underwater forests or kelp forests, in shallow oceans. They may develop dense forests with high production biodiversity.
• So, the correct answer is " A - (ii), B - (i), C - (iii), D - ( iv)".