**Your B-1 extension does not automatically disqualify you from an F-1 visa, and there is no general requirement to wait longer than two months after returning to India.** However, no one can reliably estimate your approval chances from these facts alone; applications are assessed individually. [State Department visa guidance](https://travel.state.gov/content/travel/en/us-visas/visa-information-resources/visa-denials.html)

The most important missing detail is **whether USCIS approved your extension or whether you departed while it was still pending**:

- **Approved, and you departed before the extended I-94 expiry:** The extension itself is not an overstay. Keep your approval notice and proof of departure.
- **Still pending when you departed:** A timely, non-frivolous extension application generally prevents unlawful-presence accrual while pending, provided you did not work without authorization. But filing an application is not the same as receiving approval. Keep the filing receipt, original I-94, application copy and departure evidence.
- **Filed late, denied before departure, or you stayed beyond the approved date:** The exact dates and denial reason matter. Have a U.S. immigration attorney review those records before applying. [USCIS guidance on extensions and unlawful presence](https://www.uscis.gov/sites/default/files/document/memos/revision_redesign_AFM.PDF)

My assessment is that your five-month business visit followed by a relatively quick return for study **could prompt questions**, particularly about why the business trip needed an extension and when your study plans developed. It does not establish improper intent by itself. Prepare a clear, truthful timeline supported by your records.

For the F-1 application, be ready to explain:

- Why this university and course fit your education and career plans.
- How you will pay tuition and living expenses.
- Your intention to leave the U.S. after your studies, supported by your actual circumstances and plans in India.

You will also need the university’s **Form I-20**, rather than only an admission letter, and the applicable SEVIS fee payment. Admission alone does not guarantee visa approval. [Official student-visa requirements](https://travel.state.gov/content/travel/en/us-visas/study/student-visa.html)

**Was your extension approved, pending or denied when you left, and did USCIS receive it before your original I-94 expired?** Those facts matter more to this risk assessment than the two-month gap.