The algal form that is profusely branched and which may reach the height of 100 metres.

A. May vary in colour from olive green to various shades of brown.

B. Usually attached to substratum by a holdfast.

C. Protoplast contain in addition to plastids, a centrally located vacuole and nucleus.

D. Has biflagellated zoospores attached apically.

Select correct option.

• A

  Only (A) and (B)

• B

  Only (A),(B) and (C)

• C

  Only (B),(C)and (D)

• D

  All (A),(B),(C) and (D)