Which type of rock can be considered as a biological sedimentary rock?

Correct option is D

Limestone can be considered as a biological sedimentary rock. It is formed from the accumulation of shells and other skeletal fragments of marine organisms such as coral, foraminifera, and mollusks.
These organisms extract calcium carbonate from seawater to create their shells, and when they die, their shells settle on the ocean floor and become compacted and cemented together over time, forming limestone. Other types of sedimentary rocks include clastic rocks (formed from the accumulation of mineral grains) and chemical rocks (formed from the precipitation of minerals from solution).