Give them fixed options to choose from. Or take everything away. Be patient with him/her

I would give him 2 options and if no to both then he doesnt get anything

But not to the point it embarrasses him, rather be firm with your words

Kids can’t always have their way. They need discipline and guidance

Listen to him why “no”. And after that tell him why he must do it

Teach them there are consequences for every action/decision...

May be sick or hurt or irritated...try finding the reason

Reason out with him and if its for his own good, force it

Also understand the root cause of why he’s saying no

Tell him and get him to obey, if its for his own good