टाइपराइटर के आविष्कार है ? - Invention of typewriter? - typewriter Ke Avishkaar Hai ? General Science in hindi, वैज्ञानिक और उनके अविष्कार shols question answers in hindi pdf rontgen questions in hindi, Know About Devee General Science online test General Science notes in hindi quiz book Marconni
Typewiter ki khoj solg ne kiya hai
Ans B. hoga