Can't go to 120 Hz on my monitor

[gzid]

I have a BenQ Mobiuz monitor with a max refresh rate of 165 Hz. I used to have it at a maximum refresh rate of 120 hz, but ever since my cousin played around with some settings, my monitor can't go higher than 60hz.I asked him what he did and tells me he doesn't knowI went to the Nvidia control panel but couldn't find anything about refresh rate.I use a gaming laptop with a GTX 1650 with max q and for the cable it's an hdmi cable not sure if it's 2.1 or whatever

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