What is the ratio of ATP requirement for the fixation of 6 molecules of $CO_2$ in sugarcane and 5 molecules of $N_2$ in bean?

Question

$\begin {array} {1 1} (1)\;5 \: : \: 16 & \quad (2)\;3\:  :\:  16 \\ (3)\;5\:  :\: 8 & \quad (4)\;3\:  :\:  8 \end {array}$