Question

14. Write the four blood groups in human beings.
15. A machine used to take the picture of bones. Who invented it ?​

Answer 1

Answer:

14} The two most important blood group systems are ABO and Rh; they determine someone's blood type (A, B, AB, and O, with +, − or null denoting RhD status) for suitability in blood transfusion.

15} Napier's bones is a manually-operated calculating device created by John Napier of Merchiston, Scotland for the calculation of products and quotients of numbers.

Answer 2

question 14= A+,B+,C+,O+

Explanation:

question 15 = x-ray machine

invented by = Wilhelm Roentgen