The following flow diagram represents the industrial preparation of nitric acid from ammonia.
Which of the following options describes the reagents, products and reaction condition ?
A. `{:("(p)","(q)","(r)","(s)"),("Catalyst and high pressure","Cool",NO_2,H_2O and O_2):}`
B. `{:("(p)","(q)","(r)","(s)"),("Catalyst","Cool",N_2O,HNO_3 and O_2):}`
C. `{:("(p)","(q)","(r)","(s)"),("Catalyst and high pressure","High pressure",NO_2,H_2O and O_2):}`
D. `{:("(p)","(q)","(r)","(s)"),("High pressure","Catalyst",N_2O_3, HNO_3):}`