Hellow guys, Welcome to my website, and you are watching SCIENCE & TECH BY MARUTI NANDAN SIR #SCIENCEANDTECHFORUPSC #UPSC #uppsc #science #ncert #YUVAIAS. and this vIdeo is uploaded by YUVA IAS at 2023-09-18T16:31:26-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.