'Golden age of dinosaurs'/Age of reptiles was

(a) Mesozoic                                  (b) Coenozoic  

(c) Palaeozoic                                 (d) Psychozoic  

(a) Mesozoic era is the age of reptiles. During this era, the dinosaurs achieved an enormous size and were most abundant, Mesozoic era is also known as golden age of dinosaurs.

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