The tallest tree of gymnosperms is

The correct answer is C ‘Sequoia’.

Explanation:

A: Cycas- These gymnosperms are ancient lineage evergreen perennials. They are dioecious, which means they have separate male and female plants. They have foliage leaves as well as scaly leaves. Cycas pectinata, with a height of 16.1m, is the tallest of all cycas. However, they grow slowly and may take more than 50 years to reach such a height.

B: Pinus- They are coniferous trees that are evergreen. It is popular lumber that is widely used. Pine bark is thick and scaly. They have four types of foliage: seed leaves, juvenile leaves, scale leaves, and needles. The majority of pines are monoecious, which means they have both male and female cones on the same tree. They live longer and can grow to be 15-45m tall.

C: Sequoia- Redwoods are another name for these coniferous trees. They are well-known for their size. Their barks are furrowed and fibrous. Sequoiadendron giganteum grows to a height of 50-85cm on average. Because of their massive size, the branches at the bottom usually die from the shade and are also kept.

D: Cedrus- Their barks, which are commonly referred to as cedar, are square cracked or thickly ridged. Their wood is also fragrant. Their leaves are evergreen, and they produce winged seeds that can be pollinated. They can reach heights of 30-40m.

 Hence, the correct answer is C, Sequoia.