Which among the following compounds is used as selective weed killer?

Options

A. Picric acid
B. 2, 4-dichlorophenoxy acetic acid
C. 2, 4, 6-trichlorophenoxy acetic acid
D. Salol

Answer

B

Explanation

2, 4-dichlorophenoxy acetic acid (usually called as 2, 4-D) is used as selective weed killer. It is a systemic herbie:,ide that selectively kills most of the broad leaf weeds but grasses such as cereals, grasses remains relatively unaffected.