The number of radial and angular nodes in 4d orbital are,...

Number of Radial nodes $= n - l - 1$

Number of angular nodes $= l$

Where,

$l = Azimuthalquantumnumbern = principalquantumnumber$

For $4d$ orbital, $n = 4$ and $l = 2$

In $4d$ orbital the number of Radial nodes=$4 - 2 - 1$=1

In $4d$ orbital the number of Angular nodes $= l = 2$.

Thus, the number of radial and angular nodes in $4d$ orbital are $1$ and $2$ respectively.