The correct answer is (c), Tharman Shanmugaratnam.
Tharman Shanmugaratnam is a Singaporean politician who has served as the 4th and current Senior Minister since 2015, and as the 3rd Deputy Prime Minister from 2005 to 2015. He was also the 14th Minister for Finance from 2001 to 2011.
Shanmugaratnam was born in Singapore to a Tamil family from Sri Lanka. He studied at the University of Cambridge, where he graduated with a Bachelor of Arts degree in economics in 1976. He then worked as an economist at the International Monetary Fund (IMF) from 1976 to 1982.
Shanmugaratnam returned to Singapore in 1982 and joined the Ministry of Finance. He was appointed as the Permanent Secretary (Economics and Finance) in 1994. In 1995, he was appointed as the Minister for Education. He was appointed as the Minister for Finance in 2001.
Shanmugaratnam was appointed as the Deputy Prime Minister in 2005. He was also appointed as the Minister for Home Affairs in 2005. He was appointed as the Minister for Trade and Industry in 2007. He was appointed as the Minister for Foreign Affairs in 2011.
Shanmugaratnam was appointed as the Senior Minister in 2015. He was also appointed as the Minister in charge of the Monetary Authority of Singapore.
Shanmugaratnam is a member of the People’s Action Party (PAP). He has been a Member of Parliament (MP) for Tampines GRC since 2001.
Shanmugaratnam is a highly respected economist and politician. He is known for his intellect, his work ethic, and his commitment to Singapore. He is considered to be one of the most capable and experienced leaders in Singapore.
The other options are incorrect because they are not the names of people who have been elected as the Prime Minister of Singapore.