If $p$ and $q$ are positive real numbers such that $p ^ { 2 } + q ^ { 2 } = 1$, then the maximum value of ( $p + q$ ) is (1) 2 (2) $1 / 2$ (3) $\frac { 1 } { \sqrt { 2 } }$ (4) $\sqrt { 2 }$
If $p$ and $q$ are positive real numbers such that $p ^ { 2 } + q ^ { 2 } = 1$, then the maximum value of ( $p + q$ ) is\\
(1) 2\\
(2) $1 / 2$\\
(3) $\frac { 1 } { \sqrt { 2 } }$\\
(4) $\sqrt { 2 }$