please help! one easy khan question <3

Answer:
It's the B
[tex] \sqrt{29} [/tex]
Step-by-step explanation:
[tex]d = \sqrt {(2 - 4)^2 + (2 - 7)^2}[/tex]
[tex]d = \sqrt {(-2)^2 + (-5)^2}[/tex]
[tex]d = \sqrt {4 + 25}[/tex]
[tex]d = \sqrt 29[/tex]
Hope this helps, have a good day