Determine the effective date of registration in the following instances:

i$.$ the aggregate turnover of Nithu Ltd$.,$ engaged in taxable supply of services in the state of I$\text{'}$m Doug exceeded rupees $20$ Lac on $25$th August $2018.$ It applies for registration on $19$th September $2018$ and is granted registration certificate on $29$th September $2018.$

ii$.$ what will be your answer if in the above scenario Nithu Ltd$.,$ submit the application for registration on $27$th September $2018$ and is granted registration on $5$th October $2018.$