A) Pinus wallichiana
B) Abies balsamea
C) Gnetum gnemon
D) Ephedra vulgaris
Correct Answer: B
Solution :
[b] Canada balsam is a resin obtained from Abies balsamea. The liquid is viscous, yellowish and greenish in colour. The principal use of Canada balsam is for mounting microscopic slides and as a cement for optical lenses.
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