The slogan 'Garibi Hatao' or 'Garibi Unmulan' was given in which five year plan?

Fifth Five Year Plan (1974–1978)

The Fifth Five-Year Plan laid stress on Employment, Poverty Alleviation (Garibi Hatao), and Justice. The plan also focused on self-reliance in agricultural production and defense.

In 1978 the newly elected Morarji Desai government rejected the plan.