Bronzing is associated with Fe levels greater than 300 ppm in the leaf blade of

Answer: Option B

Bronzing is associated with Fe levels greater than 300 ppm in the leaf blade of Rice at tillering. Iron toxicity is a syndrome disorder associated with a large concentration of reduced iron in the soil solution.
Bronzing is restricted to the upper leaf surface and appears as reddish-brown flecking that may uniformly cover the entire leaf surface or parts of it. Affected leaves eventually turn yellow and drop.