If The function $\phi$ satisfies the Laplace equation then what we can say about $\overrightarrow{\nabla} \phi$

Question

If The function $\phi$ satisfies the Laplace equation i.e $\nabla^2\phi=0$ the what we can say about $\overrightarrow{\nabla} \phi$

$1)$.it is solenoidal but not irrotational

$2)$.it is both solenoidal and irrotational

$3)$.it is neither solenoidal nor irrotational

$4)$.it is Irrotational but not Solenoidal

The question in may book is very lenghty ,but i try to make it condense , i am not sure that i am missing important parts of this question.I have no idea about this question,I only know about the terms Laplace,irrotational and solenoidal but not at that extent so that i can solve this question.

Please help

Thank you.