Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms

• the absence of resin duct and leaf venation

• the presence of vessel elements and absence of archegonia

• perianth and two integuments

• embryo development and apical meristem

B.

the presence of vessel elements and absence of archegonia

Gnetum resembles angiosperms in many aspects.
i) The leaves in Gnetum have reticulate venation that is an angiosperm character.
ii) The presence of vessels in the xylem is also an angiosperm character and also found n Gnetum.
iii) In Gnetum female gametophyte is only partly cellular before fertilisation and becomes completely cellular only after fertilisation. Some of the free nuclei act as an egg as there is no archegonium.
The short apices in Gnetum and angiosperms show a distinct tunical and corps configuration.
The cortex of stem of Pinus is traversed by large resin ducts or canals. Each duct or canal is linked by a layer of thin -walled parenchymatous glandular secretory cells constituting epithelium. The epithelial cells secrete resin into the canal. The resin is the chief source of turpentine.