Answer
a) P-type
b) N-type
Work Step by Step
(i) Ge is a 14th group element and In is a 13th group element .When 14th group element is doped with In a 13th group element, a electron deficit hole created .Hence Ge doped with In will generate p–type semiconductor.
(ii)B is a 13th group element and Si is a 14th group element .When 13th group element is doped with In a 14th group element, created hole will generate n–type semiconductor.
