<prompt> A substance is present in concentration of 2 mgdego in the afferent aeriole and zero mg in the efferent. True about the substance is:It is free filtered in glomerulusSecreted in coical nephronAbsorbed in PCTImpermeable in loop of Henk  <response>: A i.e. It is freely filtered in glomerulus If the substance is 0 mg in efferent aeriole, it means that all of it has freely filtered in glomerulus. 