@kishenharendra As rightly suggested by
@KAMMA SIVA RAMA KRISHNA Sir, always go for best one, irrespective of subscription figures (you will get allotment of your luck favours). Ultimately it is game of luck only (or you need to have huge sum of money to apply for bit lot size). I am writing it on the basis of my personal experience only as I got allotments in retail category on hugely subscribed SMEs (of course not on a regular basis).
The most important thing is to avoid below par or highly risky SMEs because they can cause huge loss too.
Hope you will get allotment soon which will boost your confidence and believe in luck 👍👍