Question

The Question is attached.
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Answer 1

Answer:

in both 1,2 resonance takes place and a partial double bond character comes btw C and N, making bond length smaller.thus 3 has highest bond length.

among 1,2 structure 2 has ewg at para position and thus extension on resonance increase and makes CN bond even smaller.

thus the required order of bond lentis:

3>1>2

.OPTION C is right.

please let me know if my answer and explanation are right through comment section

Answer 2

Answer:

3>1>2

option c is correct