Complete analogous pair - Pork : Pig : : Beef : ?

C. COW

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

C. 4.7

Complete analogous pair - Vegetable : Chop : : Body : ?

B. AMPUTATE

Complete analogous pair - Planet : Orbit : : Projectile : ?

A. TRAJECTORY

Complete analogous pair - Igloos : Canada : : Rondavels : ?

A. AFRICA