Complete analogous pair - Wool : Sheep : : Mohair : ?

B. GOAT

Complete analogous pair - Bombay : Maharashtra : : Trivandrum : ?

D. KERALA

Complete analogous pair - Hong Kong : China : : Vatican : ?

A. ROME

Look at this series: 1.5, 2.3, 3.1, 3.9, . . .
What number should come next?

C. 4.7

Complete analogous pair - Nark : Spy : : Shyster : ?

D. LAWYER