Anthropology is related to Man in the same way as Anthology is related to

Choose the correct alternative for the given relation.

Low : Cattle

Lumberjack is related to Ace in the same way as Chef is related to.......

Algae is to Water as Virus is to.......?

Choose the correct alternative for the given relation.

Chaff : Wheat

Cattle : Herd : : Sheep : ?