Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.

Options

A. `{:(A,B,C,D),("Detritus","Rock minerals","Producers","Litter fall"):}`
B. `{:(A,B,C,D),("Producers","Litter fall","Rock minerals","Detritus"):}`
C. `{:(A,B,C,D),("Rock minerals","Detritus","Litter fall","Producers"):}`
D. `{:(A,B,C,D),("Litter fall","Producers","Rock minerals","Detritus"):}`

Answer

A