The incumbent SAPM on CPEC in 2021 was

Khalid Mansoor was the SAPM on CPEC in 2021; this question tests current affairs. Others held different roles; B is correct. Understanding appointments enhances geopolitical awareness; this is vital for exams or CPEC discussions; Mansoor oversaw economic ties; knowing figures aids in diplomatic analysis; accurate knowledge ensures clarity in conversations about Pakistan-China relations or projects; staying informed strengthens current affairs knowledge; B matches the record.