If an acid is splashed on your skin, wash at once with

A. Soap

B. Oil

C. Weak base

D. Plenty of water

Normally you would wash it with soap and water so I'm going to say A. soap. If you just rinse your hands with water they may not get all the way clean.

D. Plenty of Water

I'd think if you went for soap first, while you were rubbing the soap in, some of the acid could soak into your skin more. I'd say rinse it off and then apply the soap.