Radio buttons acts as Check-box in TinyMce 4

Question

Here\'s the fiddle, the type is radio but acts like check-box

{type: \'radio\', name: \'letter\', label: \'Letter\'},
{type: \'radio\         


        

Answer 1

for the 2nd question: {type: 'radio', name: 'a', label: 'Letter', checked:'checked'}