Equation of Plane Passing through Three Points

Q. The minimum number of non collinear points required to define a plane is 3.

1. True
2. False

Q. Given 3 points given by position vectors $\overline{a},\overline{b}$ and $\overline{c}$. The plane which passes through these 3 points can be given by

1. $(\overline{r}-\overline{a}).\left(\right(\overline{a}+\overline{b})\times (\overline{b}+\overline{c}\left)\right)=0$
2. $(\overline{r}-\overline{a}).\left(\right(\overline{a}+\overline{b})\times (\overline{b}-\overline{c}\left)\right)=0$
3. $(\overline{r}-\overline{b}).\left(\right(\overline{a}-\overline{b})\times (\overline{b}-\overline{c}\left)\right)=0$
4. $(\overline{r}-\overline{a}).\left(\right(\overline{a}-\overline{b})\times (\overline{b}-\overline{c}\left)\right)=0$