On average you could be correct. However. Their meat eating Pakistani cousins test LOWER on IQ than the Indians. So brain volume isnt IQ and isn’t solely dietary. It is IQ that drives socioeconomic outcomes, not brain size.
Also correct for the Indians’ lower body weight. I do believe though that the average Indian is so poor and his diet so lacking in animal products that health and brain size are absolutely affected
From what I’ve heard about Pakistan, inbreeding has done a real job on their IQ. Unfortunately you can’t come back from the damage of inbreeding. Damage done.
Pakistanis have other issues that kill their IQ. Inbreeding especially.