GST transporter

Dear Maya Mahadeva
Transporter (GTA) has option to pay tax on forward charge 5% without ITC , or 12% with ITC .
As GTA services are cover Under Section 9(3) Under RCM . So if you have opted for 5%GST on FC , it's Recepient who is liable deposit tax on RCM . But if you have opted for 12% GST , Recepient is not required to do RCM , infact can claim ITC on same .

So while taking registration you are not required mentioned any option for the same.

Note : I think you have comfused with Taxpayer who is engaged in supply of Bricks , yes there it is an option if want to opt composition scheme & pay 6% on turnover.
or can Registered as regular dealer & can pay tax under 2 option (Ref Notification 2/2022 CT(r)) , 1. charge & collect 6% GST without ITC . 2. Charge & collect 12% GST with ITC (Notification 1/2022 CT(r))