Http://i64.tinypic.com/xgkz0n.jpg - Question 35 why is the answer (d)..?

35.
A. false
Nitrogen is oxidized as the oxidation number of N increases from -3 to +2.

B. flase
Nitrogen is oxidized as the oxidation number of N increases from -3 to +5.

C. false
Nitrogen is oxidized as the oxidation number of N increases from -3 to 0.

D. true
Nitrogen is reduced as the oxidation number of N decreases from 0 to -3.

...... The answer is : D. N₂ to NH₃