Select the correct statement

Stationary piston sampler and rotary sampler are both thick-walled samplers

Stationary piston sampler and rotary sampler are both thin-walled samplers

Stationary piston sampler is a thik-walled sampler and rotary sampler is a thin-walled sampler

Stationary pisto sampler is a thin-walled sampler and rotary sampler is a thick-walled sampler