Abstract. Sh2-252 is a large H II region ionized by the O6.5 star HD 42088, associated with the cluster NGC 2175 and is a part of the Gem OB association. The sub-H II regions Sh2 - 252 A, B and C of this complex are thought to be formed in the swept up cloud created due to the interaction of the ionization front of the massive star HD 42088 with the surrounding molecular cloud. Hence this complex is an ideal target to study the properties of the young stellar objects (YSOs) and initial mass function (IMF) in triggered star forming conditions. We have performed deep optical imaging survey of the region in the V and I_c bands over an area of ∼ 1^o × 1^o down to 23 magnitude in V. Using the Spitzer-IRAC observations, ∼ 500 candidate YSOs (Classes 0/I/II) have been identified indicating the richness of this complex with the young stellar population. Hα slitless spectroscopy survey of the region helps identifying over 60 Hα emitting sources. Spatial distribution of these candidate YSOs shows number of sub clustering across the region and most of them are seen to be obscured in the optical observations. The location of these candidate YSOs on the (V-I)/V colour-magnitude diagram reveals that ∼ 90% of the YSOs have ages ≤ 5 Myr with a median age of ∼ 2-3 Myr and have masses in the range of 0.3 - 2.5 M_⊙. The characteristics of the YSOs, evolutionary scenario of the sub-H II regions and IMF of the complex will be discussed in this presentation.