In street lighting, _____ is used to produce yellow light. November 5, 2021March 12, 2022 mbilal005 Everyday Science MCQs FPSC NTS PPSC Past Papers Test Questions, FPSC Assistant Director AD Investigation Past Papers, FPSC Assistant Director Past Papers MCQs Solved Test Questions with Answers, FPSC Inspector Investigation Past Papers (A) carbon(B) sodium(C) nitrogen(D) lithium The answer is: (D) lithium