Study the cycle shown in Fig. 12.7 and select the option which gives correct words for all the four blanks A, B, C, and D.

Options

A. `{:(A,B,C,D),("nitrification","ammonification","animals","plants"):}`
B. `{:(A,B,C,D),("denitrification","ammonification","plants","animals"):}`
C. `{:(A,B,C,D),("nitrification","denitrification","animals","plants"):}`
D. `{:(A,B,C,D),("denitrification","nitrification ","plants","animals "):}`

Answer

B