Unified Soil Classification System (USCS) classifies soil as fine-grained when more than 50% of soil particles pass through which sieve?

Explanation

In USCS and ASTM classification, soil is coarse-grained if 50% or more is retained on No. 200 sieve (0.075 mm), and fine-grained if more than 50% passes through No. 200 sieve.