Visitor visa for sister & Family

[Desi2004]

I am a GC holder. My sister (43), Brother in Law (46) and daughter (13) are going for Tourist visa interview to Calcutta. They have another daughter (18) who is not visiting. Brother in Law works in Tatas. I have following Questions.

1. What are the chances. Anything specific they need to keep in mind other than what is mentioned in your site.

2. They are already on their way but don’t have Marriage cert or marrige photos. However Passport mentions Spouse name.

[immihelp]

1. It is subjective and no one can tell for sure.
2. It is not mandatory.