Suppose that num is an int variable. The statement num is greater than $0$ and num is less than $50$ in Java is written as:

num $>0$ and num $>50$

$($num $>0)$ and $($num $<mn>5</mn><mn>0</mn><mtext></mtext><mi>)</mi>$

num $>0$ && num $<mn>5</mn><mn>0</mn>$

$$ Norie of these