UAN & BGV dilemma: Startup vs MNCs (LTM/Capgemini/Cognizant,tcs ninja). Need advice!

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Bhai log, thodi advice chahiye career aur BGV (Background Verification) ko lekar.

My Current Situation:

Mere paas 4 base offers (4 LPA) hain: Cognizant, Capgemini, LTIMindtree (LTM), aur TCS Ninja.

Cognizant: Inka mail aaya hai ki meri joining Feb se May ke beech aayegi.

Capgemini: Meri joining 26 Nov ko Pune location ke liye aayi hai. Maine yahan internship bhi kari thi. Hamare college se jo bacche the, usme mere group ka domain Data Analytics (Python, Tableau, SQL) tha aur dusre group ka Python & PySpark tha. Abhi unme se kuch bacchon ki full-time joining aayi hai aur unko "Agentic AI Automation" role mila hai. Toh ab mujhe kaafi risk lag raha hai ki mujhe exactly kya role milega.

LTIMindtree: Yeh abhi mera main target hai kyunki wahan proper development role milne ke zyada chances hain.

The New Startup Offer:

Aaj hi maine ek Gurgaon based startup (Ethara AI) ka interview clear kiya hai (mere ghar ke paas hi hai).

Role: LLM Post Training Expert L1. Yeh ek semi-tech/QA type role hai jahan AI outputs ko train aur verify karna hai.

Pay: ₹46k per month.

Joining: Is Monday se hi start hai.

My Core Question / Confusion:

Agar main abhi is startup ko join kar leta hoon, toh woh mera UAN (Universal Account Number) generate kar denge. Mera plan hai ki jab LTM ki joining aayegi, toh main is startup se proper relieving letter le kar wahan switch kar lunga.

Kya Ethara AI se UAN generate hone par LTM ke BGV mein koi issue aayega?

Mujhe pata hai ki GET (Graduate Engineer Trainee) role mein starting mein UAN generally nahi banta, par jab LTM full-time me convert karega tab PF account aur purana UAN record mein hone se aage chal kar koi problem toh nahi hogi?

Kisi ne pehle aisi situation face ki hai ya kisi ko HR/BGV policies ka idea hai toh please guide karo. Kya mujhe LTM/Cognizant ka wait karna chahiye ya abhi Ethara AI join kar lena better rahega?