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# 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?

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

(4) 3 : 8