autism has nothing to do with vitb12 level, however as mentioned vit
b12 does help in nervous system development., u can use syrup neurokind 5ml bd will give u nearly 300 microgram and added on tat u daily diet will supplement the rest.
Next Steps
for the autism u may hv to visit pediatrician or development pediatric.
Health Tips
donot self medicate, before taking any medications do consult it with doctor n donot but otc drugs