Riddle is used for

A. Smoothing and cleaning out depressions in the mould

B. Cleaning the moulding sand

C. Moistening the sand around the edge before removing pattern

D. Reinforcement of sand in the top part of moulding box

Answer: Option B

Solution(By Examveda Team)

A riddle is typically used to improve soil quality by allowing the gardener to sieve through soil and remove stones, twigs, large lumps of clay etc. and hence provide a finer tilth.
Riddles may also be used to help remove soil from harvested vegetables.