WBCS(Executive) Prelims 2022 Official Paper

Bronze is an alloy of

${\text{O}}^{2-}$ is isoelectronic with

Who founded Servants of India Society?

'Ornithology' is the science of

Among six persons A, B, C, D, E, F, there are 3 married couples of which A, C, E are husbands; B, C, D are cousins and B is not wife of A. Then husband of B is