The correct option is B Holocene
The Phanerozoic eon is divided into three eras - Palaeozoic (540 - 253 mya), Mesozoic (253 - 67 mya) and the Cenozoic (67 mya - till date) era. Of these, the Cenozoic era still continues today. The Cenozoic era is divided into two periods - Tertiary (67 - 2.5 mya) and Quaternary 2.5 mya - till date). The Quaternary period is continuing till date, and is further divided into two epochs - Pleistocene (2.5 -0.01 mya) and Holocene (0.01 mya - till date). Hence, we are currently living in the Holocene epoch.