​The diagrams A-D below show the relative abundance of major groups of plants (refer to legend) in four different geological periods (Devonian, Carboniferous, Tertiary and Cretaceous).​

​Match the diagrams (A to D) with the correct geological period.​

Correct option is B

Step-by-Step Analysis of Each Diagram:

Diagram A: (Cretaceous)

• Presence of Gymnosperms is high.

• Angiosperms start to rise but are not dominant.

• This matches the Cretaceous, where Angiosperms first evolved but Gymnosperms were still dominant.

Diagram B: (Devonian)

• Mostly Early vascular plants, minimal presence of others.

• This matches the Devonian, where vascular plants began to diversify, but seed plants had not yet evolved significantly.

Diagram C: (Tertiary)

• Angiosperms are clearly dominant.

• Gymnosperms are present but reduced.

• This fits the Tertiary, when Angiosperms became the dominant plant group.

Diagram D: (Carboniferous)

• Pteridophytes are dominant, with early vasculars still significant.

• Gymnosperms are minimal.

• This matches the Carboniferous, known for vast swamp forests of ferns and other spore-bearing plants.

Option 2 is the correct answer: A – Cretaceous ,B – Devonian, C – Tertiary, D – Carboniferous