If there are $10$ values each equal to $10$, then standard deviation (S.D) of these values is :

Given the heights (in cm) of two groups of students:

Group $A:131\mathrm{cm},150\mathrm{cm},147\mathrm{cm},138\mathrm{cm}$
$144\mathrm{cm}$
Group $\mathrm{B}:139\mathrm{cm},148\mathrm{cm},132\mathrm{cm},151\mathrm{cm}$
$140\mathrm{cm}$
Which of the following is / are true?
I) The ranges of the heights of the two groups of students are the same.
II The means of the heights of the two groups of students are the same.