What will be the drynessfraction for liquid ($$m_1$$) and vapour ($$m_2$$) mixture?

A

$$x = \frac{(m_1 + m_2)}{m_1}$$

B

$$x = \frac{(m_1 + m_2)}{m_2}$$

C

$$x = \frac{m_1}{m_1 + m_2}$$

D

$$x = \frac{m_2}{m_1 + m_2}$$