Assertion:
$3 d_{z^{2}}$ orbital is spherically symmetrical.

Reason:
$3 d_{z^{2}}$ orbital is the only d-orbital which is spherical in shape.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Both Assertion and Reason are incorrect

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Solution

The correct option is E Both Assertion and Reason are incorrect

There are $5 d$ orbitals, and they all have complex geometry. Out of the five orbitals, the three $(d_{X Y}, d_{Y Z}, d_{X Z})$ project in between the axis and the other two $d_{Z}^{2}$ and $d_{X}^{2} - d_{Y}^{2}$ lie along the axis.

Only $s$ orbitals are spherically symmetric.

Thus, Both Assertion and Reason are incorrect

Hence, the correct option is $E$

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Assertion:3dz2 orbital is spherically symmetrical. Reason:3dz2 orbital is the only d-orbital which is spherical in shape.

Assertion:
$3 d_{z^{2}}$ orbital is spherically symmetrical.

Reason:
$3 d_{z^{2}}$ orbital is the only d-orbital which is spherical in shape.