**Explanation:**

A biogeochemical cycle refers to the movement and transformation of elements and compounds between living organisms and the environment. These cycles can be classified into three main types: sedimentary, gaseous, and sedimentary-gaseous cycles.

Sedimentary cycles involve the transfer of elements and compounds between the biotic and abiotic components of the Earth's crust. These cycles typically involve the deposition and accumulation of materials in sediments or rocks over long periods of time. Phosphorus and sulfur are examples of elements that undergo sedimentary cycles.

Phosphorus Cycle:
- Phosphorus is an essential nutrient for living organisms and is a key component of DNA, RNA, and ATP.
- The phosphorus cycle involves the movement of phosphorus through the biosphere, lithosphere, hydrosphere, and atmosphere.
- It begins with the weathering of rocks and minerals containing phosphorus, releasing it into the soil and water.
- Plants uptake phosphorus from the soil through their roots, and it is then transferred to animals through the food chain.
- When plants and animals die, their organic matter decomposes, releasing phosphorus back into the soil or water.
- Over time, phosphorus can be transformed into sedimentary rocks, such as phosphate rock, through geological processes.
- These rocks can then be uplifted and eroded, releasing phosphorus back into the cycle.

Sulfur Cycle:
- Sulfur is an essential element for living organisms and is involved in various biological processes.
- The sulfur cycle involves the movement of sulfur through the atmosphere, lithosphere, hydrosphere, and biosphere.
- Sulfur can be released into the atmosphere through volcanic activity, industrial emissions, and the burning of fossil fuels.
- In the atmosphere, sulfur can combine with oxygen to form sulfur dioxide (SO2) and other sulfur compounds.
- These compounds can then undergo chemical reactions to form sulfuric acid (H2SO4), which can contribute to acid rain.
- Sulfur compounds can also be deposited onto land or water surfaces through precipitation, where they can be taken up by plants.
- Sulfur is an essential component of amino acids and proteins, so it is transferred through the food chain to animals.
- When plants and animals die and decompose, sulfur is released back into the soil or water, completing the cycle.

Therefore, the pair that represents a sedimentary type of biogeochemical cycle is phosphorus and sulfur (option B).

Sedimentary cycles include those of iron, calcium, phosphorus, and other more earthbound elements. In a sedimentary cycle elements move from land to water to sediment. Main reservoirs are the soil and sedimentary rocks. so, option b is correct.