It's there. The pin to your profile option.
Once you click that it will be pinned in your profile when you visit your dashboard.
there are no option like pin this tweet. chekh my uploaded photo,hope you will understand my problem
Hello there, stiffbud is right that the option is there. In the photo you provided, there is
Pin to your profile page option. Have you tried to click that? If no, you should try it then let us know here if it's working or not. Visit your profile after clicking that option to check if the tweet was pinned. Check the image below: