(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

elements before uranium

inter transition elements

elements after uranium

actinoid elements

$\mathrm{Co}^{2+}$

$\mathrm{Cu}^{2+}$

$\mathrm{Mn}^{2+}$

$\mathrm{Sc}^{3+}$

$\mathrm{La}^{+3}(Z=57)$

$\mathrm{Ti}^{3+}(\mathrm{Z}=22)$

$\mathrm{Lu}^{3+}(Z=71)$

$\mathrm{Sc}^{3+}(Z=21)$