General Science Kis Dhatu Ki Kami Ho Jane Se " Twacha Par kharonch " Jaisi dikhne Lagti Hai ?

किस धातु की कमी हो जाने से " त्वचा पर खरोंच " जैसी दिखने लगती है ? - Deficiency of which metal leads to the appearance of "scratch on the skin"? - Kis Dhatu Ki Kami Ho Jane Se " Twacha Par kharonch " Jaisi dikhne Lagti Hai ? General Science in hindi,  Chemistry Loha question answers in hindi pdf  chandi questions in hindi, Know About Sona General Science online test General Science notes in hindi quiz book    Jasta