Which of the following geometric shapes of aggregate particles provides the highest shear strength and interlocking capacity?

As per IS 1077:1992, what is the minimum acceptable compressive strength of any class of burnt clay bricks in dry state?

Match the solvents (List 1) with their corresponding resins (List 2) used as ingredients in a varnish: List 1 (Solvents): P) Methylated spirits of wine Q) Wood naphtha R) Boiled linseed oil S) Turpentine List 2 (Resins): 1) Copal2) Mastic3) Cheap varieties of resins4) Shellac