Benjamin Netanyahu has served as Prime Minister of Israel in multiple periods: 1996-1999, 2009-2021, and 2022-present. Based on the options (Sharon, Olmert, Peres), this question likely targets his current premiership (as of the question's writing). Ehud Olmert was PM 2006-2009, Ariel Sharon 2001-2006, and Shimon Peres served as President (not PM) 2007-2014.