Typical crude protein content of whole sunflower seed (on seed basis) is approximately:

Correct option is B

· Scientific reviews describe sunflower seed protein content typically in the range of about 16–19% of the seed.
· Feed composition tables show crude protein values commonly around 15–20% for whole sunflower seed, depending on variety and conditions.
Why other options are wrong
· (a) 5–8% – far below observed ranges for sunflower; such low protein is more typical of some starchy grains, not oilseeds.
· (c) 35–40% – this is closer to protein content of sunflower meal/cake after oil extraction, not whole seed.
· (d) 50–60% – unrealistically high for sunflower; such levels are closer to highly concentrated protein isolates, not normal seed.