Ganesh Sir, thanks for the appreciation. I tend to follow rule of thirds and that's the reason I didn't crop the bottom.
Pramod Sir, your guess is right! These grains are because of two reasons: 1. High ISO:400 (had to bcoz of poor light) and, 2. Due to cropping.
I remember that CNP members have suggested to use a tripod for macro shots. But I don't have a decent one and I don't feel comfortable carrying it around the neighbors
. Most of my shots lack something or the other and the prominent reason being lack of a tripod. May be its high time for me to buy one and start using it.
Thanks a lot for appreciation and criticism.