Naturalization Timelines for GC sponsored?

[shahji]

Hi,
My spouse sponsored me while she was on GC, I got my green card in 2016 and she naturalized in 2017. So I wonder if I become eligible for naturalization in
a) 2019 (after 3 years of GC as my spouse is a US citizen)
b) 2020 (3 years After my spouse become naturalized)
c) 2021(after my 5 years on GC)

I was sure about (b) and (c) but my wife thinks that I'm eligible now after completing my 3 years of GC as she is a citizen now.

Any help is appreciated.
Thanks

[miiki]

Not A.

The general eligibility requirements state “Have been living in marital union with the U.S. citizen spouse, who has been a U.S. citizen during all of such period, during the 3 years immediately preceding the date of filing the application and up until examination on the application”

https://www.uscis.gov/us-citizenship/citizenship-through-naturalization/naturalization-spouses-us-citizens