D) None of these
It was signed on 14 April 1988 at the Geneva between Afghanistan and Pakistan to settlement of the situation relating to Afghanistan. United States and the Soviet Union served as guarantors. It was a bilateral agreement between Pakistan and Afghanistan on the voluntary return of Afghan refugees and withdrawal of Soviet troops from Afghanistan.
It officially began on 15 May 1988 and ended by 15 February 1989, thus putting an end to a nine-year-long Soviet occupation and Soviet–Afghan War.