How we got to know that we are in fluidity list or not, is there any criteria for this or randomly?

I think you should meditate and focus on doing the right deeds. Study, do your work and try to switch. Don't think about all this

Simply ask to RMG Spoc , if yr salary around 20L ,grade c3a or +, aapka kaam or bhi koi kar sakta he kum salary me, to aapka naam aayega fluidity list me pakka, e log AI ka bol rahe he ki agar 5 bnde he team me to abhi AI implementation first level pe he to 2 bnde ko fire krte he or clients bhi bolte he ki kitna AI implementation hua or company ka fayde ke liye e kr rhe he.

Why do you need further tensions in your present? Have some peace and focus on your work. Tcs is not the only organisation in India. Nor they are giving luxurious pay to take so much stress.

The thing is, you never know. Only your manager and HR rep will know. But they will pretend they dont know or say some excuse like its with their seniors.
It's a classic move to spread panic and create FUD. This way, a lot of people will resign on their own and that many less people they will have to fire and pay severance.

Gut feeling, and lack of working skills, let's take your example.