The correct option is B Hutatma Smarak
The State Reorganisation Committee (SRC) suggested keeping the Mumbai state separate from the state of Maharastra. To oppose this move of the SRC, the Samyukta Maharashtra Samiti launched a protest at the Flora Fountain, in Mumbai. The Bombay State Government ordered the police to open fire at the protestors. This event lead to the death of 160 people. Hence, the Hutatma Smarak was built in 1961, to honour these martyrs.