(a) compound having one ethoxy group attach with 2nd carbon of propane chain,IUPAC name is 2-ethoxypropane (b) compound having one methoxy group attach with 2nd carbon of chain and one OH group attach with 1st carbon of ethylene.IUPAC name is 2-methoxyethanol(c) compound having two cyclopentane ring attach with oxygen atom.IUPAC name is (cyclopentyloxy)cyclopentane