In which of the following cases the heavier of the two particles has a smaller de-Broglie wavelength? The two particles

Question

$\begin {array} {1 1} (1)\;move\: with \: same \: speed & \quad (2)\;move \: with\: same \: linear \: momentum \\ (3)\;move \: with \: same\: KE & \quad (4)\;have \: the\: same\: change\: of\: potential \: energy\: in\: a \: conservative\: field \end {array}$

 

$\begin {array} {1 1} (a)\;1,2 \: and \: 3 & \quad (b)\;2 \: and \: 4 \\ (c)\;2\: and \: 3 & \quad (d)\;1,3 \: and \: 4 \end {array}$