Hi Adeel,
Solgar is a very good quality brand and I agree with Maha that at this age 100 IU is sufficient. For the Exjade dose, remember this as she grows. 30 mg/kg body weight. So at 12 kg, the dose would be 30 mg x 12= 360, so it needs to be at least 300 mg right now and soon should be bumped up to 400 mg.