Math Chapter Wise Sets, Relations And Functions English MCQ JDD-75-PGT TIER II-X-15 28.06.2015 Q.For any two real number, an operation defined by a*b=1+ab is– Aneither commutative nor associative Bcommutative but not associative Cboth commutative and associative Dassociative but not commutative Show answer Correct answer: commutative but not associative