For a critical study of secondary growth in plants, which one of the following pairs is suitable?

Teak and pine is most suitable for the study of critical secondary growth because in secondary growth, secondary tissues are formed from lateral meristem which is well developed in these two cases andsecondary growth occurs in gymnosperms and dicots. Wheat, sugarcane are monocots, maiden hair fern and fern are pteridophytes, deodar and sunflower are dicots.