व्यावसायिक खाद्य तेल मुख्य रूप से निम्नलिखित में से किस पौधे से निकाला जाता है?

Which of the following accurately describes the historic medicinal use of the extract derived from the bark of the cinchona tree?

Which of the following plants is widely used as raw material in paper manufacturing?

Which of the following plants is commercially used for making sugar?