Question

Which of the following is a correct relation?

• A. ${}_a{\mu }_r={}_a{\mu }_w\times {}_r{\mu }_w$
• B. ${}_a{\mu }_r{\times }_a{\mu }_w={}_w{\mu }_a$
• C. ${}_a{\mu }_r{/}_r{\mu }_a=0$
• D. ${}_a{\mu }_r/{}_w{\mu }_r={}_a{\mu }_w$

Answer 1

Answer: (D)

When going through the option, we see that
$\frac{{}_a{\mu }_r}{w{\mu }_r}=\frac{{\mu }_r/{\mu }_a}{{\mu }_r/{\mu }_w}=\frac{{\mu }_w}{{\mu }_a}={}_a{\mu }_w$