Deworming is an important process to eliminate parasitic worms from the body. For a 1 year 9 months old baby, there are several safe and effective remedies available. It is recommended to consult with a pediatrician before administering any medication. Some commonly prescribed medications include albendazole and mebendazole, which come in chewable tablets or suspensions. These medications work by killing the worms or preventing them from growing and reproducing. The dosage will depend on the weight of the baby, so it's crucial to follow the doctor's instructions carefully. Additionally, maintaining good hygiene practices such as washing hands regularly, keeping nails short, and avoiding contact with contaminated soil can help prevent reinfestation. Regular deworming every six months is generally recommended for children in high-risk areas or those with symptoms of worm infestation.