Why it is necessary to shake the serum sample, distilled water and ammonium oxalate solution while standing for 30 mins?

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.

answer; the code in musculoskeletal system subsection is associated with deep tissue possibly to the bone;