Q. ध्वनि तरंगें हैं ?

(A) लम्बवत्
(B) तिर्यक (तिरछी
(C) आंशिक लम्बवत्, आंशिक तिर्यक
(D) कभी-कभी लम्बवत्, कभी-कभी तिर्यक

✅ Correct Answer: (A) लम्बवत्

Published by Krishna Sharma ⭐ 48.52K Points at 22-Mar-2021 09:27 am in Science

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