Which fungicide is used against Oomycetes class of fungi?

Answer: Option B

Metalaxyl fungicide is used against Oomycetes class of fungi.
Metalaxyl is a systemic fungicide used to control plant diseases caused by Oomycete fungi.
Its formulations include granules, wettable powders, dust, and emulsifiable concentrates. Application may be by foliar or soil incorporation, surface spraying (broadcast or band), drenching and seed treatment.