[单选题]
A uniform rod of mass f c3pty/9kh1 vM and length L rotates around a vertical axis throuqimi *- fc5xaxnnx77 26ay8rcgh its center. Two equ nax2qycn8c 7i 6x f*7-rxm5iaal forces act on the rod as shown in the diagram.
The moment of inertia of the rod when rotating about its centre is $frac{1}{12}ML^2$.
Which of the following gives the angular acceleration of the rod?
A. 0
B. $\frac{6F}{ML}$
C. $\frac{12F}{ML}$
D. $\frac{24F}{ML}$
