(A) is true, (R) is true and (R) is the correct explanation for (A)

(A) is true, (R) is true but (R) is not the correct explanation for (A)

(A) is true but (R) is false

(A) is false but (R) is true

planar; trigonal bipyramidal

pyramidal; square pyramidal

planar; square pyramidal

pyramidal; square planar

$\mathrm{Al}(\mathrm{OH})_3: \mathrm{H}_2 \mathrm{O}$

$\mathrm{Al}(\mathrm{OH})_3: \mathrm{Na}_2 \mathrm{O}_2$

$\mathrm{Na}^{+}\left[\mathrm{Al}(\mathrm{OH})_4\right]: \mathrm{H}_2$

$\mathrm{Al}(\mathrm{OH})_3: \mathrm{Na}_2 \mathrm{O}$

$\mathrm{C} . \mathrm{Ge}$

$\mathrm{Si}, \mathrm{Ge}$

$\mathrm{C} \cdot \mathrm{Pb}$

$\mathrm{Ge}, \mathrm{C}$