We introduced the "Normal Equation", which is an analytical method to compute the coefficients of

linear regression. Which of the following is$/$are true about Normal Equation?

We don't have to choose the learning rate.

It becomes slow when number of features is very large.

There is no need to iterate.

$($Normal Equation or Closed Form Solution for the linear regression$)$

a$.1$ and $3$

b$.1,2$ and $3$

c$.2$ and $3$

d$.1$ and $2$