Which of the following statement (s) is (are) true about thermal radiations?(i) Thermal radiation are electromagnetic waves(ii) All bodies emit thermal radiations at all temperature(iii) Thermal radiations are reflected from mirror(iv) Thermal radiations of all wavelengths travel in free space with same velocityChoose the correct answer

• A. (i), (ii) and (iii)
• B. (ii), (iii) and (iv)
• C. (iii) and (iv)
• D. All of them