A rigid triangular body, PQR, with sides of equal length of $1$ unit moves on a flat plane. At the instant shown, edge QR is parallel to the $x$-axis, and the body moves such that velocities of points P and R are $V_P$ and $V_R$, in the $x$ and $y$ directions, respectively. The magnitude of the angular velocity of the body is

1. $2V_R$
2. $2V_P$
3. $V_R/\sqrt{3}$
4. $V_P/\sqrt{3}$

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