Edible oil is obtained from seeds of
Helianthus annuus, the common sunflower is a large annual, herbaceous flowering plant belonging to the family Asteraceae. Sunflower oil which is extracted from the seeds is used as edible oil for cooking.
Carthamus tinctorius, commonly known as Safflower is a highly branched herbaceous plant belonging to family Asteraceae. It is commercially cultivated for vegetable oil extracted from seeds. It is an edible oil used in cooking, salad dressing etc.
So, the correct answer is 'Both B and C'.