Chenopodium oil is used in

The correct option is Ascariasis.

Chenopodium oil, also known as oil of wormseed or American wormseed oil, is an essential oil extracted from the flowering plant Dysphania ambrosioides (formerly known as Chenopodium ambrosioides).
Historically, this oil has been widely recognized for its potent anthelmintic properties, meaning it is highly effective in expelling parasitic intestinal worms from the body.

Ascariasis is an infection of the small intestine caused by the giant roundworm Ascaris lumbricoides.
The active component in Chenopodium oil is ascaridole, a naturally occurring organic compound that specifically targets and paralyzes the roundworms, facilitating their expulsion from the host's gastrointestinal tract. Therefore, Chenopodium oil is used in the treatment of Ascariasis.