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16. A resin comprising: 

at least one repeating unit (A) selected from repeating units represented by any one of the following general formu- lae (III) to (V); 

a repeating unit (B) represented by the following general formula (I); and 

a repeating unit (C) represented by the following general formula (VI): 

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wherein 

each ofR 04 , R 05 and R 07 to R 09 independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, a halogen atom, a cyano group or an alkoxycarbonyl group; 

R 06 represents a cyano group, a carboxyl group, -CO› OR25 or-CO-N(R 26 )(R$_{27}$), and R 26 and R$_{27 }$may be bonded to each other to form a ring together with a nitrogen atom; 

each ofX 1 to X$_{3 }$independently represents a single bond, an arylene group, an alkylene group, a cycloalkylene group, ---0-, -S0 2 -, -CO-, -N(R$_{33}$)- or a divalent linking group composed of a combination thereof; 

R 25 represents an alkyl group, a cycloalkyl group, an alk› enyl group, an aryl group or an aralkyl group; 

each ofR 26 , R$_{27 }$and R$_{33 }$independently represents a hydro› gen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group or an aralkyl group; and 

A represents an ionic structural site capable of decompos› ing upon irradiation with an actinic ray or radiation to generate an acid in a side chain of the resin, 

wherein the repeating unit represented by the formula (III) is a repeating unit represented by the following general formula (III-1) or (III-4): 

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wherein in formulas (III-1) and (III-4) 

Ar la represents an arylene group, 

R 01 represents a hydrogen atom, a methyl group, a chlo› romethyl group, a trifluoromethyl group or a cyano group, 

R 02 represents an arylene group, an alkylene group, a cycloalkylene group, -0-, -S0 2 -, --CO-, -N(R$_{33}$)- or a divalent linking group composed of a combination thereof, 

-continued 

