Two metal wire 'P' and 'Q' of same length and material are stretched by same load. Their masses are in the ratio \(m_1 : m_2\). The ratio of elongations of wire 'P' to that of 'Q' is
1
\(m_{1}^{2} : m_{2}^{2}\)
2
\(m_{2}^{2} : m_{2}^{1}\)
3
\(m_2 : m_1\)
4
\(m_1 : m_2\)