Gaurav i just refered K&B and practised Examlabs mock test(you can install it from google, its just free of cost and gives real exam like environment). Initially my score was as low as 25% in Examlabs even though i had gone through K&B twice.
But with god's blessings i did'nt gave up and you won't believe that a day before exam my score was 53 .
I gave test given on K&B CD and i scored just 61 even though i practised open exam book question which are just similar to closed exam questions. On exam day , just RELAX...
Like everyone says real exam is much easier than given in K&B and very much simpler then mock test.
Believe in god and remember "Hard work is key to success".
All The Best