Q. फाउन्टेन पैन के आविष्कारक कौन थे ?

(A) पारकर
(B) चैलपार्क
(C) शैफर
(D) वाटरमैंन

✅ Correct Answer: (D) वाटरमैंन

Published by Praveen Singh ⭐ 36.81K Points at 25-May-2024 04:13 pm in Physics

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