The correct option is B Hari Singh was left with no choice but to sign 'Instrument of Accession' with India to merge Kashmir with India.
Maharaja Hari Singh intended Kashmir to remain an independent state. Kashmir was attacked by invaders at the instigation of Pakistan in October 1947. Raja Hari was not able to prevent the intruder as he did not have enough resources. To take India's help, he signed the 'Instrument of Accession' with India to merge Kashmir with India. They won the area from the possession of intruders. But unfortunately, some part of it still remained in possession of Pakistan.