Bank accounts in itr

From FY 14-15 you need mention all the operative bank a/cs, you may ignore a/cs which have just 3-4 transactions

Any pension recieved by a armed forces personel is taxable unless its a family pension which has certain exemptions

all acccounts are necessary

total income matters

Al bank statements necessary 

But there is only one cell for bank a/c in ITR 1 & 2.

from AY 2015-16 onwards only you can enter all bank details