Well I won't be surprised if they don't have Muslim agents because RAW's enemy is Pakistan,so there might be chances of defection.
Like the Iraqi Christian pilot,who landed his plane in Israel.
Then again,you never know!
a muslim agent can blend more easily in pakistan and bd, a christian agent in EU and US, a hindu agent in nepal and a north-east agent in tibet or china.
and RAW is lucky that it has all sorts of ppl to choose from.
and defections, well, are you saying that all muslims in sub-continent(india,bd) are at the risk of defecting from their motherlands to pak??